I think it is vastly improved, since I lost maybe two games of Dom 2 in all the time I played it (I only play SP) but have lost 3 of 4 games so far with Dominions 3.
The biggest problem that has been around since I first got Dom 2 is enemy pretenders picking death-3 scales on non-Ermor nations. This is probably the single most frustrating thing about Dominions to me. I hate coming to a new nation and killing its 100 total troops and taking its 5000-person populated capital all due to heavy death scales.
