I never really felt like it needed to be stronger. Dancer has plenty of support as is I think. And improv to me mostly feels like a filler buff handed out so we have something to do when bosses are powering up their big spectacle attacks etc, or other moments where there's nothing to hit and no mechanics we need to move for. A nice little defensive party buff to toss out while you have nothing else to do but not an especially potent or powerful part of the job's tool kit.