I call my FNX 45 the "USP 45 Tactical at home" for a reason. Lul.
I mean, yeah its a good gun and all, and it has more features than the USP (larger mags, Pic rail, an optics cut), but the USP still has a better trigger (well my HK45 does) and the HK45 shoots a bit softer, but I can only really tell when I shoot them back to back. Accuracy is a wash, and longevity is TBD, but I picked up my FNX used, and my first experience with it was as a jamm-o-matic, as I had neglected to really clean and lube the gun before I took it out for its first spin. Seems like the guy who traded it in ran a can on it until it got so dirty that it began to malfunction and just dumped it. It's fine now, of course.
The "squishy" magwell of the FN is overblown, imho, and mostly due to cramming 15 rounds of 45 into such a limited space. You're not really going to be collapsing the sides of the grip in with a proper grip, with a magazine in the gun, you can only really pinch it together a bit at the bottom.
I like my VP's too much to even give the FN striker pistols a fair shot, which is too bad, as they seem to be fairly good pistols, just in a saturated market full of good options.
I would like FN to drop an FNX in 10mm, the amount of good 10mm DA/SA options is pretty much limited to the EAA Witness pistols.