The more time I spend with mine, the less I feel compelled to change anything.
I switched springs right away, have a thinner front sight on the way, and will add thick grips once they become available. I may throw in an 85 trigger from my old Shadows to reduce the DA throw slightly, but that's it.
I've been spoiled by my Automatic Accuracy shadows, but this thing is ready to rumble out of the box.