FWIW, I'm seriously about to switch out my p2000 9mm for a USPc 9mm for similar reasons. With the way my hand grips the p2000, the trigger reach is just a hair too long, and the break is just a bit further back than I'd prefer. My trigger finger gets pinched, actually -- especially in the take up. That bottom curl of the trigger bites into my finger tip and that gets old after a few mags. But the USP compact's trigger reach is perfect. I can comfortably set my finger into any position, near tip, middle, or even close to the joint with any real adjustment to my grip. Take-up, break, and the shorter reset are nice and comfortable, too. Also, for as low as the p2000 sits in the hand, when I get my support hand where I want it, I'll get slide-bite. This happens on my P30 and P30L as well. That extra bit of material on the USP compact prevents slide bite from occurring. The adjustable grip of the p2000 doesn't mean much for me since in any of the configures, S, M, or L, I get the same issues, and I don't feel as thought I get as much support hand contact-to-frame as I do with the USP Compact. Furthermore, I feel like I can really get behind the gun w/ the USP compact w/ my support hand so that I don't inadvertently ride the slide release lever and prevent slide-lock.
All in all, I really think the USP compact is just a better fit for me and the more I handle them both and shoot them the more that seems to be the case.