Boys, you are hard on the P5... the trigger of mine is one of the best I ever found on a DA/SA design. It is comparable in weight with my Beretta 92 Compact, with a much shorter pull. In SA, of course, the stake up necessary to lift the firing pin is present but it can be mastered fast.
My only problem was the serrated trigger and its cutting edges. In my opinion, serrations are a negative gimmick on DA/SA designs. Alas all my Walthers, my P38 excepted, have them. As I shot my P5 mostly for defensive drills (DA/SA doublettes), I polished the trigger face, using a round stone fixed on the press drill. And the result is pretty good, the face will be cold blackened when I'll achieve a miror polish with other tools. But time is money and I miss both.
L.