I don’t think there will be any improvements to the default A320, other than the various bugs needing fixed. Now FlyBywire ( a group that have taken on the developement of the stock A320 from asobo) and are improving the aircraft all the time, hopefully to study level given time. This has made the aircraft more enjoyable to fly as more systems come on board.
If interested just search for Flybywire A320NX