I have a P-64 as well as CZ82.
From what I have read about the P-64 is the crazy heavy DA pull was a deliberate design as the P-64 was intended for use by the Polish police forces. Supposedly, it was to make the user 'be sure' they wanted to pull the trigger. I have also read that during real world use, the heavy trigger pull would not be a factor (adrenaline); I have luckily not had that experience.
I replaced my springs with a Wolf set and am guessing the DA trigger now is ~15-18 lbs., while the SA is super silky 4-5 lbs. (No gauge, just judging against my other pistol triggers that I have measured.) I think before I changed springs, my DA was~ 24 lbs+. I always found the transition from DA to SA pull to be amazing.
I have large hands and reasonable hand strength and do not find recoil to be unmanageable, so I would suggest reviewing grip fundamentals to be sure your/your wife's firing hand is proper. I agree that this gun is not one for long range sessions. 25 rounds is a lot for any session. I train with larger pistols. Due to the size of this pistol, I train more with 1 handed shooting with this gun than any other I own. It is very easy to improperly grip this pistol, and get cut on the web of your hand with a 2 handed grip.
I use this pistol as a pocket carry in summer, or when I go to a formal event (theater, wedding, etc.). Except for these occasions, I would carry my CZ 82 or larger pistol instead of the P-64.
Having said what may seem like a lot of negatives about the P-64, until CZ comes out with a single stack sub-compact model, I feel the P-64 is a far better choice than LCP or Shield pistols because I find it much more accurate and have less recoil then small polymer guns.