In the latest USPSA magazine in the steel frame Q5 article there is mention of Walther making available aftermarket disconnector springs that will change pre-travel, reset and pull weight and are compatible with the polymer frame models as well. Be curious to see what they come out with.
Part of the fun in this game is tinkering with your gear (and still maintaining reliability). Goal being a 3.5lb trigger (do able in most other polyframes i.e. SIG, Glock with drop in trigger kits) without any downsides to mechanical performance (dead trigger).