Help me make a good "Dancer" Support Champion

I've been trying to make a Dancer Champion for a while, but the current iteration I have is a little... stale compared to the Champions we get these days. With Kindred's recent release, however, I have gotten an idea on how to make unique mechanics for a Dancer, but still need some opinions to iron out the kinks.

Here is my rough envisioning of the unique gameplay hook for this Dancer (named Freesia).

Dance Partner Freesia can select an allied Champion to be her Dance Partner, linking her to it and altering how her abilities affect them. Once selected, there is a short delay before the link is completed, and Freesia can change her Dance Partner after X seconds (if her ally hasn't died during that time).

Since dances are usually a two-person affair, it makes sense that a Dancer Champion would need a partner to pull off some of the better tricks. However, unlike Kalista this bond is not permanent, and the Dancer can change who the Dance Partner is (though it takes time so you can't pull off screwy stuff in team fights). You can only have one Partner at a time, though.

As for the rest of the kit, I imagine a Dancer Support Champion should be a hyper-mobile Support, something we presently don't have. Though Champions like Janna can move fast, they don't zip around the battlefield like a Yasuo or Lee Sin using tons of dashes. I think a Dancer with that capability could be really fun to play, providing a gameplay hook that hasn't been explored yet.

But beyond that, I could use some opinions. Anyone want to chime in?