Just play the spin-offs, a lot of them doesn't have both.
I like their participation in KH1 and 2, haven't had a problem with them on 3 so far.

I would like to have no party members and just go solo like in BBS. But I don't even know if I want to continue on.

I guess not. I literally have no desire to play it unless I am with my kids and they are watching. 

If they had made the game more a traditional RPG I would be all in. For instance instead of locking characters to stages (Hercules, Woody, Buzz, Rapunzul, etc) let me build a party with them. Make a story about all of these characters banding together. Donald and Goofy while I think they are fine in their original roles in their cartoon just do not work for me in these games. 

Ugh, no they need to just reboot and have Disney hire to write a fairly simple, concise and emotional impactful story (which incorporates Donald and Goofy more). This franchise has fallen so far from its commercial potential because it’s plagued by the convoluted, aweful story telling that dominates most Square Enix games.

SE has had the lead for the last 20, I’d really like to see Disney call the shots next time and SE just act as an executioner that brings their additional visual flair and gameplay experience along.

They will have to make the other 10 versions of KH3, so I think Half Life 4 will be out before Kingsom Hearts 4 is.

When Kingdom Hearts first launched i absolutely loved it. I was more familiar with all the Disney characters than i was with Square/Final Fantasy characters so i never complained about Donald nor Goofy and i beat the game. I played and finished the PS3 HD remaster last year and i noticed how atrocious the world design is, it's really bad especially the Tarzan level while Tarzan being me favorite Disney movie no wonder i always got stuck or lost when playing as a kid.

But yeah still a good game!

Big no from me.

Nope, Sira himself is often a pretty boring character Donald on the other hand can be pretty funny at times. Goofy is a great friend for Sora and since frienship and bonding are pretty important in KH, it would be odd if they wrote them out of the series.

They should modernise the combat though and make it much more difficult though. I would say make the story easier, but it's way too late for that. Though the game does a well enough job covering the basics. 

No, just no.

If they want to get other caracthers in there, Im more than fine.But dont take them out because of some silly reasons like these you listed.

And even if they put on new people on your main party, make them come back in later games.