Maldraxxus and Ardenweald don't really have covenant "races"; they're just a bunch of cooperating creatures.
The venthyr and kyrian have no reason for existing outside of the context of their native realms and irs direct connections, barring obviously the Nathrezim (and they seem about the least likely friendly race in existence).
So yeah, is this just a "Gimme gimme" mentality fault on the OP's part, or is there an actual plan in regards to what you want in here somewhere?