Did we really need to know Anakin's story? perhaps, but in hindsight, I'd rather keep Vader as an enigmatic character that in the end..and freaking SILENTLY lol returned to the light to save his son and himself. Than what we got in the end, a whiny little bitch that becomes a whiny little bitch in armor...Perfect.
A better, or at least to me, a more interesting prequel in my opinion should have been something like the cinematic trailers of The Old Republic game. from a time were a helluva lot of badass Sith were fighting Jedi in their prime, perhaps a very young Yoda to tie things up but that would be about it on that matter. Far in the past so you don't HAVE to tie things up, but above all a good story about it. Want Wookiees in it? sure why not, most species from the OT would be already running around back then, so have your fun with that, but remove yourself from the OT, it's best if you do that...oh wait a bit late for that.
I'm sure everyone here has seen those epic trailers. either on their own or seen back to back in chronological order are BY FAR better in story, action sequences and that old Star wars feel to it than the entire PT.
I haven't played the game so I have no idea if it's good or bad, just talking about the trailers in their own merit.
The one thing I truly love from the PT is Darth Maul, but sire enough, G.F.Lucas gave him 2 lines of dialogue, 5 minutes of screen time and an illogical, stupid death. Way. To.Go.