I'm not sure how they'd do it, but if they were going to make a sequel (maybe prequel?), and it was based off the way Human Revolution played, what would you need/like to see improved? For me personally, I think the animation system needs to be improved, 'cause some of the stuff just seemed stiff. The facial animations and overall look need to be updated, 'cause it looks somewhat archaic most of the time. I think the cover system needs slight improving as well. While I disagree with people about Jensen's voice, some of the other voices could have been a lot better. I'd also like to see some more color to the environments that you hang around in for most of the game, 'cause a lot of it is orange.
If there are bosses, it's not that the battles need to be more interesting for me, though that wouldn't hurt; it's that the character needs to be fleshed out more. And finally, while I do like the overall sound, from fine voice acting, mostly great soundtrack, and nice sci-fi sound effects, I think the sound design needs a little more to it to sound life-like. It all sounded mono, or stereo without surround, and I think many games suffer from it, it'd be nice if it sounded kind of like Battlefield 3 (yeah, that's a lot to ask). I hate when games sound comes more out of the bass and not the actual speakers, and I just felt like the way it went about the sound was a little intrusive. I didn't hate anything about this game, I love it, so don't regard what I'm saying as completely negative toward Human Revolution.
I think if everything was one step better than Human Revolution, the sequel/prequel would be amazing. What about you?