I'm new to the CZ-82, so new that I haven't figured out how to completely disassemble one yet. That said, I have the impression from things that I've read online that the -82 single action trigger does NOT lend itself to much crispening up simply by reason of the hammer/sear geometry, and that attempts to get a crisp letoff may just ruin the parts you're working on.
The single action pull on mine IS "mushy" compared to many other pistols, but I've found that in all but the most deliberate accuracy shooting it becomes quite comfortable and natural after you shoot it a lot. In a side-by-side with one of my Makarovs, for example, doing draw-and-engage exercises against IDPA targets, the trigger on the Makarov (not a breaking-glass-rod by any means, but crisper than the -82 by a good bit) did not produce any different results on target. Even in more-deliberate shooting at 50 yard steel plates, the softer trigger of the CZ is something that I adapt to fairly quickly. So even though it is different, it still works just fine for me, for all but bullseye targets.