I doubt it- in a fully completed map, the amount of detail that the new engine calls for is tremendous. Having a number of expensive water sources throughout the map will be taxing, no doubt, especially at key clash points. I'd imagine that bridges would home to many a firefight, and where there's a bridge, there's water... and a drop in framerate.
Or maybe it can be done... More power to you. Something like this has never been done before, we've only been at the engine for a few months now. Find that balance of detail, and you'll be set.