I would like this too. And I would like to see a much bigger number of seats available in premium cabins on popular routes - anywhere in Europe, anywhere in USA, Japan would hit the sweet spot for me.
I'd like them to convert the Platinum can ask for a FF seat to be released" to a guaranteed release when requested say once per membership year, or as a loyalty bonus when you are half way to LTP but will never make it or some other way to encourage those with LTG to stay flying with QF.