I suspect they'll mention something like this when announcing 10.0 & promise to go back to some basics, but the question is how far will they actually go with it. I see it as similar to how Class Ability updates were presented to us with SL. They mentioned a few abilities which they de-pruned and talked about how each class should feel better. Really though, they mostly brought back a handful of abilities for a few classes, moved some abilities to baseline, & called it a day. The classes definitely feel better, but they still aren't quite as intricate as they were pre-WoD.
I could absolutely see them promising to get rid of borrowed power & return to basics, but only take that halfway & instead tie that borrowed power into gear or some infinitely grindable currency instead.