To be honest, although I was a huge fan of Wipeout 2097, I think in my case, the time difference between that and Fusion on the PS2 was too large to be noticing that much of a difference in controls. What especially grabed me were the stunning graphics (despite the aliasing) and the absolutely incredible sense of speed that the previous ones simply couldn't convey very smooth. Being on PS1, how could it.
The controls IMO were good - although you are right that there was less of an impact from the weapons. Can't judge hitting the walls too much, since that's something I kind of tried avoiding (and with good result actually as I became more accustomed to the controls and speed). I have played quite a bit of Wipeout Pure on the PSP and that is said to be much closer to 2097 in terms of gameplay again. It's good - but I must say, I somewhat prefer Fusion better. I'm guessing a lot has to do with the 30fps framerate and the stupid analog stick which makes a comparison between the two quite difficult.
Fusion had its faults - but it also enhanced the series on so many ways that I guess I must have overlooked some of them. Fusion was also had a *very* steap learning curve, which I suspect may be the reason so few like it.
The electronic music was a mixed back IMO. Some absolutely amazing tracks and some not really all that good. Most memorable are the ones from F.S.O.L. and Amethyst IMO. On the old ones, chemical brothers had some good ones, as well as Prodigy of course.
The worst thing about Fusion though, IMO were the obstacles on the track and those very wide areas which IMO were quite overdone. The rain forrest was a spectacular track though - something I would like to see in the new Wipeout.