Would be an amazing development if all of that can be delivered. I don't think the currently approved scheme is quite so ambitious. Unfortunately T3 (and pretty much T1) are included in the TP video for the current "series of 60 improvements". An enlarged security area is mentioned for T3....we live in hope! T3 is, easily, the worst of the current terminals.
To my mind a major operator needs to move out, I think FR would be ideal. T3 just wasn't designed for 200 seat narrowbody jet operations all day.