I don't mind the idea of a power splash, but it doesn't fill the same void in the park as Rocky Hollow or TRR. A log rideis a genuine family ride, a power splash is a ride that isn't thrilling enough for most thrillseekers, and is really at the high end for what you could reasonanly call a family ride. So if you wanted to do a power splash, fine, but it's not really something that works as a log ride replacement, and there's about 5 other things DW needs first before a power splash.
That power loop looks like such a confused concept, because by adding an inversion you've taken out the family element all together, and you now have a ride that is borderline not that thrilling, that families won't ride, that you also get wet on. In the right park maybe it'd work, but it's a very firm no from me.