Tomobogan---thanks for the advice, and that's exactly what I've been doing.
I have little experience with striker fired, but i have fired several, and wasn't overly turned off by them. I was pretty happy with the pre-recall SR9 trigger- gritty but the feel was good. The new one is very, very different and (for me) hard to control.
In order to asses the problem (assuming operator error) I HAVE been doing the wall drill a lot, working on grip, trigger finger placement, etc. and it is extremely difficult for me not to get lateral movement on trigger pull.
Also unhappy with the trigger, I tried something before a range trip that I think helped, and I'll pass it on.
I field stripped the gun then put the mag back in and looked at everything that moves on firing. I dumped oil all over all of it (perhaps "dumped" is an exaggeration) including the backside of the trigger. Then I dry fired just the trigger mechanism a lot, holding the gun in all different angles. Then I cleaned the oil out.
The other thing I did was take off the slide and turn it over. There is a small cleat or bracket on the striker. I put a little oil around there and (using a hard plastic dowel) I pushed the striker bracket back toward the rear of the pistol. I figure this simluates the firing motion, but pushing it back as far as it will go compresses the spring slightly MORE than it would in firing. I did that for a few minutes.
I took a range trip after that effort and actually thought I saw an improvement. I am still almost always getting pulled off target when I pull the trigger, but the wild, off the paper stuff is rare. So I went from three out of 5 off the paper to all on the paper, with inconsistent locations. That's real progress, I think. Considering I could shoot the gun as well as any other when I got it, it's still not up to where it should be, but it's better than it was.
The trigger may still not be for me, but I think in doing what I described I've loosened it up a little.