Let's assume that's true, what action did he use it for? He couldn't heal himself if he was actually infected, and the other abilities aren't much better than his regular ones, even considering that his regular abilities are consumed.
He can't recruit units, I already asked the Master about that in a private message.
Update: Indeed, the main advantage of the ultimate ability is that it applies to the first action in the list. The fact that it's applied to a unit, not a player, is also important, but less so.