I have had minimal issues with my Mirco pf swap. But it was a huge undertaking. As Arcadenerd mentioned, I too had to drill two holes that were not present. I also had to widen some of the post holes with a dremel tool. Had I not done this, and jammed the posts through the hole, I probably would have had lifting or cracking clear.
I also used the dremel drill bit set recommended by Kruzman (and many others here on Pinside) to clean away and remove clearcoat at every single dimple and hole on the top side. This is critical to do or else you will have cracking/lifting clearcoat. I also drilled 1/2 inch pilot holes at every screw hole.
The need for mantis or cliffy protectors seems like it goes without saying on a brand new playfield. This seems like common sense. Any Bally/Williams game from the 90's that had outholes had the same issue with wear around the edge of holes. this is not unique to Mirco playfields.
I think a playfield swap is a major endeavor and perhaps the manufacturers should produce a check list of what needs to be done to the pf step-by-step to avoid any issues. But perhaps this is impractical. I just know if I had not read a million threads about this i would have run into issues. It is not a simple process.