I have the Shield 9 1.0 PC. I bought it before the price drops.
I also have a Shield 45 with the aggressive grips and front slide serrations.
1. The PC trigger is supposed to be better, I do like it.
2. The front slide serrations are not an issue. I don't use them.
3. The Shield 45 grips are WAY better. Got Talon grips right away.
Now, I'm pretty much set with the Shield 9 1.0. If it got stolen, I would definitely get a 2.0 replacement. But, barring that, I don't have any desire to upgrade.