Yes. The general issue with the reduced power striker spring is that it can create issues with harder primers not going off because the striker doesn't strike the primer as hard as the factory spring. The solution, especially if you load, is to know what primers you're working with and remain consistent in your ammo selections. Which is something someone competing should try and do anyway. If you still have trouble with it you can either buy an extended tip striker, or go back to the factory spring.
As for the plunger spring, I don't think I've ever heard of any issue with it. As far as I know it will lighten the trigger pull but doesn't do anything to reliability. Do you have a source or link to these complaints?
CM