Swarm hosts don't get the ability to move while burrowed outside of the campaign. From what I've seen so far, zerg definitely got the short end of the stick with this expansion. Terran, which was already the best designed race in WoL, got some very useful additions to their arsenal, protoss got some very good harassment air units while zerg got some limited useable lategame units.
And as always, TvT remains the most interesting and diverse matchup. Seeing some really good games this MLG after the Ro16. I'm glad the tournament included so many good koreans.