Trigger slap? Or the bottom of the trigger pinching your finger between it and the trigger guard?
I ask because I have a BDM with that curved trigger and it bites the hell out of my finger. No more recoil than a 9MM has and yet a box of ammo is my limit.
It's funny how what works for one person does not work for another, or what works on one gun doesn't on another.
My P07 .40 S&W is one of the older guns with the curved trigger and it never pinches my trigger finger. I got a P09 9MM with new style trigger and it doesn't pinch my finger. I bought a P09 in .40 S&W and it is as bad as the BDM, after about a box of ammo, I didn't want to shoot it anymore. I bought an old style (curved) P07 trigger and installed it and no more finger pinching.
I don't know if you can get a different style/curve trigger for the 75 or not, but you could check out Cajun Gun Works or CZ Custom and see what they offer and how it's shaped vs. the factory trigger.
http://www.cajungunworks.com/index.html
http://czcustom.com/