For a quick summery for those not in the know, Sonic Colors Ultimate in it's launched state:
-Has a Switch version with bugs so frequent and bad it's currently being compared to Sonic 2006.
-Has a PC version that accidentally contains the development tools within it.
-Reports of crashing on all versions of the game.
-New UI elements less polished than stuff I made from the ground up on RPG Maker.
-In-Game Typos.
-The same issues the Sonic Adventure DX had 20 years ago, but worse (Inferior lighting, odd texture choices, etc.)
-Lag on the character customization screen.

I didn't even buy the game and I'm still disappointed.

In other words, you are better off downloading a wii emulator and playing the original.