What major global leagues are you missing? There are hardly any missing, except for the Brazilian league. It's to do with legal/image rights that are a mess there. Russian (won't comment as it's political). The other two semi-important missing leagues are MX and Japanese, and that's to do with deals they have signed with Konami.
The clubs from Serie A (Inter or Milan) are under a fake name for the same reasons. They signed exclusive deals with Konami (Juventus came back into the game from the other camp).
No disrespect, but adding weak and unpopular leagues that are only followed by locals might be nice to a small portion of the player base is a bit pointless to a mobile game. Outside of that, it's just a flood of '60s cards, only usable for training.
