If they never cure cancer, we can start asking serious questions. For now, the answer to why a 1/6 doll is delayed by a few months is like this:
Production delays from a majorly stressed workforce being asked to make more product than they can handle, with more and more licences popping up every month, and not enough time to make the products they already put up for preorder.
We might not like it. We might be angry(I don't mind, as i relish getting this piece in hand finally, but don't mind if it's this month or six months from now), but that's the bottom line. Just production delays getting stuff out the door.
It will be the same figure with no mods as we all ordered. We are not due anything extra or anything free for having to wait. It's part of the terms and conditions that SS have no control over when the product will arrive. We just have to be patient.