Seriously? I've thought people have expressed their complaints on the Adventure games multiple times.
I don't dislike the games, I just don't like the idea of being forced to do hunting and shooting when all I want is to play as SONIC. SA2 is extremely guilty of the alt gameplay design because it's like once you finish a Sonic level, you have to go through 2 or 3 non-Sonic levels before going back to him. Other things I did not like was the shitty friends (Shadow and Rouge for example) and the melodramatic story.
I think the only thing I miss from the Adventure games is the Chao Garden.
So the treasure hunting seems to be the main complaint...maybe if they change it to give it a more zelda-dungeon puzzle like feel(but extremely light) than just randomly put emerald pieces anywhere then tell you if your hot or cold could that fix it? I have no problems playing with characters other than sonic as I fully expect the adventure like games to have them that will never be a complaint from me as I find all the sonic characters important in a sonic game. People want it to be a straight up mario type game but know damn well with the right talent behind it a sonic with a good story and gameplay could be a very epic game. It could work, sonic team shows glimpses of that but never can really put it all perfectly together always half assed somewhere. I believe its the talent working on the games rather than what type of game it is.
No. I want to play as Sonic in a Sonic game. If Knuckles and Tails are StH3 style variations, then I'm fine. What I don't want is to do non-Sonic things in a Sonic game.