I mean, even with Starfox Zero, a game hardly anyone gave a toss about in the first place, the announcement of an invincible mode made headlines on IGN/Eurogamer/etc and brought on loads of angry comments across the net. And again, that's with a game of almost Zero (har har) importance.
I actually don't believe there was much of an outcry. I for one completely missed it. Yes, gaming media probably made a thing out of it, for easy clicks, but were there in real many people upset about it?
Thankfully the majority were cool with it, but there was still quite a lot of complaints in various forums and comments sections. It helped that the game itself wasn't a major release and that thanks to 7 years of Super Guide a lot of the people who were so against it had gotten it out of their system and come to grudgingly accept this sort of thing.
Still there was a lot of stuff like:
"I don't know why games should be made that autoplay themselves. Whats the point? Are people really that incapable of any sort of difficulty? So what if a player struggles. It's the only way they'll get good."
"New gamers are getting catered way too much"
"Giving every scrub a chance to blast through the game is bad game designing"
"Remember when games (especially Nintendo games) were challenging and didn't hold your hand because they assumed you were either a kid or a complete n00b? Remember when even the simplest of games actually required skill to beat or get good at?
Because things like this kinda make me miss those days. Much like the EXP Share and White Tanooki Suit before it, this "Invincible Arwing" looks like another attempt by Nintendo at casualizing their games to appeal to kids and casuals by removing any sort of skill and holding their hands all the way through. Seriously, with features like these, what's the point of even playing the game in the first place?"
"Urgh, at least turn the Arwing into a toy and have it shoot water instead of lasers, having the bosses call you out on it and just fly away in disgust when encountered with this mode on would also be a nice touch.
You know make it blatantly clear that the player sucks and is having his hand held through it."