As others said, I don't see Alf's escape as content that was cut from the game because it really is something extra which you can get if you really enjoyed the game, or leave it if you didn't. It has it's own story, new game mechanics, new levels and doesn't change anything in the main game. People are usually angry with day 1 DLC because it's effectively ULC.
Therefore I don't mind having to pay extra for it, especially since it's not very expensive for what it offers but i also wouldn't object if they gave it for free
As for the skin, i honestly don't care either way, unless it's in a preorder package thingy, i'm not getting it.
All in all, J.A.W. are annoyingly slow at releasing stuff since they are such a small team but i trust they will do their best for their customers.