This is the only 3D Sonic game that satisfy me to the highest extent. I mean I heard that SA was good as well, but I really prefer this one a lot more. And when I read your final thought, I agree with you all the way. If they can follow most of the things that are in SA2B, then they'll might create a very good 3D Sonic game one day.
erm... what you on about in the story part they don't think hes a secret weapon they think he stole the chaos emerald also this game was great and 2p chao garden was always fun