I like the idea that we have something other than Stamina Mastery to upgrade into for a Vitality based Stamina Item (a corollary to Arcane Surge and Kinetic Dash, if you will).
I would absolutely LOVE if something like this was implemented, and then another T4 item was added that combined all 3 items into some ridiculous stamina happy item that makes it so that you get any of the effects WHENEVER you consume stamina and/or it has a CD to work kind of like how they used to before the Shop rework (a.k.a. when they triggered you didn't actually consume the extra stamina).