OK... First Wii U album was added on 30/sep/2012 however, the platform itself was selectable at least from 10/mar/2012, I know that because of a rejection by Myrkul here:
http://vgmdb.net/db/albums-history.php?id=31949
Has anybody said a word about that (possibly even bigger gap)? It was going to happen anyway, it was inevitable, just like with the ps4. So I can understand the aesthetics reasoning of a longer list, but nothing more than that.
I'm fine with whatever though.