The poly/fiberglass like material is used in some industrial applications so the rails will hold up just fine. It's thick and gangly, but it is reliable. If they molded a better grip texture into the frame, they'd probably sell a little better, but I think they'll eventually discontinue it like all of the other P-Series. Thinner, lighter handguns with more capacity all over the place means it's just a matter of time.
Take the S&W SD9VE as an example of a lighter, thinner and striker fired gun with better ergos and 1 extra round. It's at the same price point as a P95, sometimes less.