We now only have vamp (for magicka dps mostly) and werewolf (for stam dps mostly)
Though like classes vamp and werewolf are not bound to those roles, they are most useful when combine with those roles.
So now we should have three more world skill lines for other roles (again not necessaily for those roles) to make "play however you want" a reality!
World skill lines should aim to do the following:
1.Only one at a time like vamp and werewolf, this adds more diversity to each toon
2.Should be a fine addition to toons that already doing great job on their role, but should be crucial for those considered "not good" combination (for example, barely anyone use nightblade tank because dragonknight are the best and templar are the second best, adding tank-oriented world skill line should make nightblade tank viable, but not making dragonknight/templar tanks too powerful)
3.Please give us a chance to NOT be daedra worshipper
Think about this for addition contents, we either join in blood-sucking or flesh-eating cult to be stronger, and in dlc we: became thieves and assasins, and we overthrown an aedra worshipping orc king, made a daedra supporter sitting on throne....why can't we be a good aedra supporter and do some good things?