actually, there is a precedent. the ecto1 club exclusive figure was 6" marshmellow mess ray stantz. there are other 6" ray stantz figures (3 in fact).
still, i don't think it's fair to say "this is the only way you will get shadow weaver" and then release shadow weaver with a different deco or paint.
i have no problem with them releasing light spinner, but not with an extra shadow weaver head.
also, lol "lucky few". as if buying a sub or buying/trading SW on the secondary market somehow involves being lucky.
eta: the reason i don't have a problem with light spinner is because that's almost different character - like keldor.