I recently returned to CoH after a year and the first character I made was a plant control/Earth Assault Dominator (called Geoflora) based solely on theme without concern as to how well it functions as a build (only level 18 at the moment so theres not much I can say). So far I have not had any agro problems but I think thats more a question of personal play style then character abilities. I tend to treat earth assault as a kind of secondary crowd control and not as a form of dps.
On an old plant/storm summoning controller build (which I got into the 40s) I found entangle to be of limited use (eventually doing away with it) and found spore burst to be problematic as all too often thoughtless trigger-happy blasters would throw aoe powers and wake everything up instead of taking full advantage of the mass sleep effect.
