I think it's cool. Considering those enemies would keep popping over for example when back-tracking to already explored areas I'd say that would be very convenient.
And what do you think about it?
Back when I was playing pen-and-paper RPGs with friends there was a whole class dedicated to providing 'knowledge benefits' but they were pretty much different in nature: bonus on hit, magic resist or... perhaps armor?
Note those were pretty much orthogonal to the tactical issues noted above.