Never seen that one. Do you have GC turned up to some crazy high value? Those actors should be cleaned up.
Not currently. It’s not crazy to add. Just change the play rate from a float to FSplineCurve and update things as needed. I’m slightly hesitant to add that in by default simply because it seems like a fairly specific requirement. Seems like most people keep it at one value rather than use a curve (and the cost that goes with it).