You know, just for lols, I replayed a level or two of every 3D sonic game (minus heroes because I don't own it, and for the record I didn't like it, and 06 because I don't own it and !@#$ 06), and I'm kinda amused by the results.
I noticed a marked increase in quality of the gameplay with each successive game. which I find amusing due to the sonic fandom's tendency to go "EACH NEW GAME WAS WORSE! SA2 DA BEST!"
Seriously! SA1 was all loose and the level design was kinda...meh. The wind valley which I thought was one of the better levels had actually very little input required to beat. And the volcano level had some serious issues too.
SA2 felt tighter...but was still really clunky. Radical highway felt like a lot of sudden stops kept coming up, and Metal harbor was better, but still really clunky.
Shadow the Hedgehog was much smoother than SA2, but brought its own issues to the table (overemphasis on combat). Yeah, sure, the internet levels were kinda inventive, and Sky Troops was fun, but I didn't enjoy having to stop and clean up enemies from time to time in order to progress (although at least the guns make that a breeze most of the time). ...I'm actually feeling a bit nostalgic for that game now...
Unleashed (wii)...Wow. Big step up. I replayed most of the levels (not saying much, since there's like...6?). My biggest gripes with these were the fact that the boost is segmented, preventing you from just...ya know, boosting ahead. That and how you need to chain actions and stuff to fill it up. The levels were fine. A bit too race-coursey with littel exploraition., but overall still fun to play. I think the only reason it's so reviled is because it (the wii version anyway) was something like 70% werehog.
Sonic Colors felt like a HUGE step up. Aquatic park 1 and Asterioid coaster 1 both felt like there was a lot to do, while also preserving the !@#$ out of forward momentum. The only real problems I felt were the inability to drift and sidestep, and the overabundance of little gimmicks.
Generations was...Yeah, it was awesome. I played Chemical park and the Heroes level and I wanted to keep going and play the rest of the levels.
So...Given that Sonic has a track record of IMPROVING, minus the hiccup that was 06, I think that I'm ok to have faith in Lost world not sucking as bad as the critics are saying.
At least until the freakin demo hits in NA and I can try for myself. Seriously, why do we not have the demo yet?!