Originally Posted by JandK
However, I will concede that enemies use it to wake one another up from sleep.

That doesn't really bother me, though. Kind of a "so what?" thing.
Doesn't that make you not want to use the sleep spell, because enemies can both wake up an ally and still attack you? Then that woken up enemy can take their turn, waking up another enemy and still attacking you? All of which makes the Sleep spell so much more ineffective than other similarly leveled spells, or even perhaps basic actions..?