I am surprised to hear folks replacing Walther triggers. No experience with the PDP but the PPQ’s I’ve shot were fantastic striker triggers. Too light for me to use defensively (personal problem/issue) but fantastic to shoot.

Once you try one, you'll understand. Yes, the PPQ stock trigger is better than the Glock stock trigger, but the keyword with Walther's Dynamic Perfomance trigger is "refinement". This trigger belongs on a pistol like the Q4SF, which is something of a luxury item.

Glock uses a partially cocked striker which must be drawn further rearward by the trigger pull before release. The Walther employs a fully cocked striker which needs only to be released.

https://waltherarms.com/blog/free-ameriglo-optic

I don't have personal experience with the Haven but it looks like Ameriglo is offering a free one with the purchase of a PDP.