Please tell me they added spell combinations!

Nope.

Werebears (Not playable)

Pseudo Dragon Riding (Meh)

Spears (Trolololol)

Goblins (Riekling's)

New water effects (If that counts)

A Dremora butler summon (Sort of like that skeleton butler from Gamejam)

There could be more. I'm not going to bother looking though.

Virtually nothing I think, beyond I believe using a lot of the goblin stuff for rieklings

can u kill the butler?

Ok I too am an incredibly curious person...
But why would you ask this? xD

He's a summoned creature I don't suppose it matters strike him down he'll be back when next called