I dont think we will see any further updates now, although I could be wrong. I wonder if the little floor tweak as there to bring a bit of the air from the front strakes, guide it to the floor edge and allow the air to come back up to the side/just above the floor to feed the diffuser from above. From a total amateur view, that little tweak appears to direct airflow in that sort of direction. Pure speculation however.
Only other thing is something we arent likely to see, underfloor or something internally.
As JAF suggested - I think there will likely be 1 more mid-large(ish) upgrade this season and a LOT of focus switched to next years car development. There doesnt seem to be any changes being drummed up like there was with TD039 and the raised floor/throat heights so progress this year is unlikely to be affected by mid-late season rule changes going into 2024.