Fans tried warn with feedbacks and fangames.
But the Sega don't understood the classic sonic, used the modern sonic for test (The Mr. Crowley Sonic), and don't did a sonic based in essence.
Sonic Adventure is the first error of Sonic Franchise (the cool "skater" stupid sonic, the non-surreal stages, the bad physics and/or bad collisions and the linear games). The Sega divided the fanbase and wanted in all forms, enter in 3D world. But ignored the quality and the "objective personality" of sonic.
Well, my surprise is... only now, started the crises.
Sega, try make a radical change, or sale sonic for retro-studios, nintendo (Carol Yas) or one guy with love and quality vision.