My view on delamination is that it's a fault in the manufacturing process and you would notice this quite soon after playing with a new bat. The surface of the bat starts to lift up, and it doesn't necessarily come with cracking. It could possibly be repaired by taking the surface layer off, re-sanding etc, but the batmakers would know better than me.
The other sort of delamination which has been discussed on the forum is just natural wear of a well performing bat, where the surface cracks along the grains and sometimes across them, but this is not the same as the surface lifting off, and is not a fault, and I wouldn't even call it delamination.
Hopefully, the above makes sense