To build on Gamarasa's point:
Nomadic factions in CK II gain their power from having large amounts of empty land under their rule. They physically CANNOT "Go Tall," due to the way population works. That's one of the main reasons Beastmen are so weak, IMO: they're nomadic realms that can't expand beyond maybe a duchy or two. Event troops help, but only to a limited extent. Thus, the furries suffer the indignity of being at the bottom of the totem pole.
Blood Dragons are the epitome of going tall: they lack the realm-building skills/interest that allowed their Von Carstein brothers and sisters to weld Sylvania into a sprawling undead realm of terror and happy thoughts (for vampires). They're probably best compared to Nechrarchs: isolationist perfectionists who happen to prefer swords to magic.