I never got the idea that the Navy's going to an Army (WO-pilot-centric) model. More that the concept was the WOs would be there to augment the URL aviators...sort of "cockpit SMEs," I suppose.
I seriously doubt that the problem in the Navy will ever be that the FWOs are bogarting all the flight time. If anything, it'll be the opposite - there will be so few of them, relatively speaking, that some skippers will pigeonhole them into ground jobs and favor the URL aviators with hours "because they need the flight time for advancement".
I can totally see some 'I'm skipper now, I can rearrange the universe to my whimsy' type guy saying, "well, what does it matter if CWO Bob makes HAC this tour? He's just going to come back to the Fleet in 33 months. He'll get nothing and like it."