I'm not all that knowledgeable about the 97B.
The bushing change was already explained.
They've changed the baseplates on the mags, to cover the unsightly gap. (They should have changed the mag catch a bit, instead.)
They sometimes don't feed hollowpoints as well as they should, but some have fixed that after polishing the ramp. Others have recontoured the ramp. CZ seems indifferent to this problem. (Raising the mags a bit, by changing the mag release might also improve the feeding of hollow points; at least two folks have done that and said it helped.)
Lazarus' point is that these are relatively simple fixes, but they haven't really responded.
That's not a long list, and not everybody has this set of problems.