Considering the Konami crew didn't change much during that time and CV3 even credits many of the former Konami programmers in the CV3 credits, without actually going through the code for all three games (already went through the code for CV3), there really isn't a whole lot to compare for the controls. CV3's controls are pretty basic. I mean, it's no Doki Doki Panic, but CV3's control code is so sound, I seriously doubt CV2's was actually better and doubt CV1's was much different at all. And CV3's collision detection was pretty damned thorough. If anything, CV3 had the best controls if you overlook Alucard being totally useless on stairs. Grant's control code shows how much care and effort Konami actually put into coding the controls for CV3.