There are also Overwatch Precision and Apex trigger options for the PDP.
The pull weight can be reduced, even with the stock trigger, with a simple spring change.
The stock trigger is pretty good. Improvements are possible but it's a different animal than a 1911 or 2011.
The closest you can get would be Walther's Dynamic Trigger and sear combo. That, along with a couple of spring changes, gets you about as close to a 1911 feeling trigger as you are going to get.
The Pro version of the PDP does not come with the enhanced sear.