can't say i've really noticed mine being too trebly. My other electro-acoustic does seem have trouble with the treble when it's plugged in, so it could be a common problem or it could be just what your guitar made out of and pickups. i've tried other ovation copies and they've deffinately needed treble boosts so i'm not entirely sure.

RS8, aswell as taking out the strips under the bridge, there is also a possibility of filing some of the actual bridge down to get it even lower. mine is really low now. what i found strange is that the instruction manual said if you lower the strings and you get fret buzz then this doesn't mean that it's a fault, but surely if you're getting fret buzz it means that it's too low?