I'd say with that amount of resilience it's at least worth trying out.
Last season, most Ferals were running with around 3.3-3.4k resilience, and our survivability didn't feel bad at all. Now, nearly no one uses Unheeded Warning anymore but picks the Resilience trinket instead, while the Resi from the rest of the gear keeps going up as well. With full gear we'll easily be sitting on 4.1k+ (AT LEAST. This is without a single gem/enchant for it), and I don't feel like anything more than 4k is what we should go for. Therefor, try it out. The damage increase is pretty big, while I doubt the survivability loss will really be a problem.
I'm personally going to try and get the HC/Normal Ragnaros trinket, which will keep my resi below 4k as well. I really don't think we should aim for full PvP gear this season.