I had never really noticed this until putting a couple hundred rounds through my Glock 45, but the reset isn’t a positive as my 45 is. It clicks and resets every pull, but it just doesn’t seem as forceful as my P series Sigs and Glocks.

I’ve polished both contact points where the trigger bar meets the chassis, but that doesn’t seem to help.

You could try to find a stronger trigger bar spring, but that will increase pull weight at the same time. At least, if I'm thinking about the FCU function properly.