Why do people hate on Ulm?

[Aleph]

I've been away for a while, but at the end of my last round of playing Dominons I was loving LA Ulm.

It has a workable blood economy with a pretender-dependent option to expand into earth/blood and the magic economy that implies, interesting immortal unique summmons which lead to some really nasty tactics (there was a really nice old article on it, but mainly Black Angel summoning within your own domain with immortal troops hurts a lot), excellent missile troops, and insane ability to generate unrest with its mage/spies.