The 'confusion' was on delivery/ground due to the high volume of aeroplanes asking what was going on, where they were in the queue, etc.
In hindsight - a better coordination of who has the tug, who has a slot, who can push and park - hey Brussels, we need to launch out of sequence etc etc would have launched and landed more aeroplanes.
We always learn - hopefully, a practical outcome can be achieved - I don't criticise the ATC, I do however have issues with the Airport who have demonstrated spectacularly dull decisions in the past.
Perhaps it is they who should visit the ATC and come on Fam Flights