Ahh, yes, that makes sense. Could still be somewhat useful in large pulls of differently named mobs, but I can certainly see it being deceptive and/or confusing much of the time.
If only there were a way of somehow linking maintained spells to a target's effects, or some way to see the duration on effect icons in the target window, but I didn't see anything promising while searching the gamedata.
Thanks for the thoughts, and I guess I'll have to keep trying to keep mentel track of who I mezzed when