I never once had an issue with camera angles in any of the Sonic games at all until Sonic 06. I never understood the issue.
The homing attack was fine in Adventure 1 and especially in Adventure 2, everything after had things like health bars and enemies holding weapons that you could smash into and get hurt with. Basically constant bad design. I really hate how they have added the reticule in the newer games now too, I just think it seems and looks so stupid. The Adventure games never needed it.
Bottomless pits are a design choice though. Look at the first sections of Sonic Unleashed or Amy's first level in Sonic Heroes, WALLS, WHAT A GOOD IDEA!