Back in the 16-Bit era, with awesome SNES games, with incredible graphics at the time, such as Donkey Kong Country, I was really looking forward to that next level in 2D graphics. Instead what we got was long loading time and blocky polygon graphics. I knew that the polygons were going to be part of the deal, was excited about that, but I expected just as many next level 2D games. 2D Games that took advantage of the extra power and colors.
And that's my problem with this game. That while it has many technical improvements, the sprites are blocky to give it that "nostalgic" 16-Bit feeling. Rather than taking advantage of the vast processing power and using 4k sprites.
Yes, the public felt that there hasn't been a true Sonic game since the Genesis game, but they're talking about the game play. It doesn't have to be exactly like a Genesis game (I know the graphics are technically better.) Just make a 4k sprite based Sonic game.