1. A series changing direction can work out and it has for Zelda but a key difference is BotW went in a direction that many fans liked since there were ones who preferred the more open Zelda's and loved exploring so it took that facet and built on it in a big way. Metroid fans in general and hell tons of video game fans in general don't want a quirky comic relief NPC following you around and suggesting what you should do so Prime 4's direction with that aspect doesn't seem like it'll please current Metroid fans or people not already into the series.

2. Some people might've gotten turned off but it being more beginner friendly than the previous two did little for it sales despite how much more successful the Wii was. The Prime Trilogy point is fair but it didn't sell that much and later in the Wii's life there was Other M which was even more beginner friendly and that one didn't do any better than Prime 3. Attempts to broaden appeal by adding NPCs, cutscenes and simplifying things hasn't worked and Dread barely outsold Prime 1 despite so many Nintendo series smashing sales records on the Switch so I really think it's just a case where a series is niche so to significantly increase mass appeal you'd have to make it lose its identity and basically turn it into a different series.

3. For some people the isolation and atmosphere is crucial to why they like the earlier Prime games and that's fine cause the reasons someone can get into a a piece of art can vary drastically. Others don't care much about those aspects and care way more about the exploration and combat which is also fine. Though in this case specifically it's more the quality of the NPCs since people largely didn't mind how Prime 3 handled it that much. If a TV series known for its seriousness and atmosphere suddenly added a quirky comic relief character that was spouting this sort of dialogue then that would understandably get a big backlash. I do think people should still wait and see how the rest of the implementation goes before giving up on it but as that trailer I posted earlier shows Miles will show up again after the beginning so it's currently up in the air how much of a presence he'll have long term.

This one is very weird to list next to the others as if it's some miniscule gripe... This legitimately means that some people can't play the game, how is it not ruined for them then? 

It is ruined for those people. What I’m saying is some — regardless of whether they sufffer from the issue — have taken this problem for the small sect and have arrived at a generalized conclusion of “DKBananza is mid.” Also, a lot of the modern gaming community still doesn’t take platformers like DK, Astro, nor Mario Wonder seriously (as most demonstrably seen in GotY discussions these past three years); yet another way in which the internet creates problems with games. 

I don't even care. Gameplay is everything.

Curious question, are you not interested specifically because of the motocyle? The first 2 trailers didn't allude to either the chatty NPCs or the Motocycle, were you hyped then or equally unimpressed?

First time I've heard of that. I've heard the game was "ruined" because of a $20 DLC that came out 2 months after the game launched.

What norm? A 1994 norm? Almost every single game after Super has gone a different direction in one way or another. It's difficult to establish a thing such as a convention in a series that has done nothing but change since its inception.

You would have a point if Prime 4 was the first game to come out since Super. But that's very much not the case.

I doubt they will bring Ridley back for this. And I hope that's the case, because in my opinion we had more than enough Ridley for some time.

I will say to you the same I said to Pemalite. You would have a point if Metroid Prime 1 was the last game of the series before Prime 4. But we had two sequels to the Prime saga and while both kept the isolation in good messure (and everything seems to point to Prime 4 doing the same), they also combined it with a progressively more direct narrative and more involved and numerous characters. A similar thing happened to the 2D games. This has been going on for quite a while. It's not a surprise. If a nerdy NPC is all it takes for some people to throw the game into the garbage can maybe they weren't that interested in the first place or they haven't been in touch with the series for more than 20 years.

As for breaking the immersion, I would say that the Aurora Units and Admiral Dane in Prime 3 already broke the "immersion" by telling you constantly what to do, what your situation is and even giving you hints and/or marking on your map where to go if you took to long to advance the story. Again, while the format is more "personal", this is not a new thing. It's an evolution of an already stablished tendency in the series. You can dislike it and that's totally fine. But people can't act surprised by this. And again, even if some people find Miles annoying, I don't think his presence (which again, will be limited) should be a factor that ruins Metroid Prime 4 as a game. Plenty of amazing games have silly acting characters, even serious games.

I don't think having a moment in which all the bounty hunters (Miles included) work together with Samus in a big battle is something to be worried about. If anything, it seems like it will be one big epic moment.

No, I don't think your opinion is disrespectful. What I find disrespectful is getting into someone elses thread, not reading the OP, answering anyway and in the answer very clearly demonstrating that you completely ignored the OP by mentioning a point that the OP has already refuted and not adressing any of his arguments. By doing this, as I said before, you either didn't read the OP or you did and you ignored the arguments it brought up. And yes, I think both things are disrespectful.

Now that you have been called out you decide to "clarify". Whathever xD

You think that going from Super to Fusion is not a huge change in pretty much every way? Or from Prime to Prime 3 (which, btw, introduces many things that people think Prime 4 is pulling from its ass)? If you are not bothered by ANY of that, but you are because of a motorcycle and a nerdy NPC then honestly I don't know what to tell you. Feel however you like about Prime 4.

I don't care if people talks bad about MP4. But I must admit that this overall reaction to something that I consider to be very minor really confuses me.