Hence why right of way should not be sorted out below 500 feet with one on final and one taking off. Generally the simplest answer is if the aircraft on final sees an aircraft on the crossing taking off, go-round, avoid in the missed approach. There's much more space to maneuver in the air, then continue to land and you both end up in the intersection anyway. The situation at Caboolture sounds way more complicated than the rules can account for and a last minute third party confused the situation and led to the outcome. Granted what may have been agreed to occur may not have been legal, but once you are in that position....