After reading the quest text about Sylvanas forcing Malfurion into a position that would compromise his traditional neutrality I had grave concerns about the Archdruid properly entering the fray. With the absurdity of his abilities in Knaakian history it seemed all too possible that Blizzard could write the great teacher outside of the bounds of believability, and stretch the fabric of the fiction too far to remain engrossed and immersed in his vulnerability as a character - particularly after the line about Malfurion being "a force of nature".
If you had told me without context that the Horde outnumbered the Night Elves 8 to 1 with Saurfang, Sylvanas and Nathanos on the team and Tyrande sequestered elsewhere, and they still feared they might lose the day I would have flipped a table, but I think this was handled very well. For one, Malfurion could have only mustered his power to such a degree on the Night Elves' home turf, at the foot of Hyjal where they lived for millenia. He couldn't have, say, marched on Durotar and uprooted walking cacti; his druids couldn't skulk about the treetops in the Horde's wastelands; there are no wisps to easily call forth on the deforested planes of Mulgore. It had to be in his people's forests, and that factor of gating his power to a region really balances it in my eyes. He's only a match for an entire army with a token force in some very restricted places, and can't easily turn those powers to the offense. The wisps were his own sort of army of the dead to match Sylvanas', but bound to trees and able to be frightened or abandon his plan altogether. And if you catch him in travel form he's clearly as vulnerable as any druid.
But what do you think? How do you gauge Blizzard's handling of his power level? How about Lorash and Chikkers and Captain manhandlind (goblinhandling?) all of those druids?