Agree with all above except the need to sort out the Loan player situation where you already have an full (or almost full) squad, and want to take a couple of players on loan. It just isn't possible...
If the number of slots per team was extended to 24 (but only the first 22 apply to 'normal' play), then a couple of loan players could be inserted into the extra slots for the duration of the tournament.
Both Palace teams are in Associations; Casuals' wasn't up to 4 teams when the Tournament started, but Terriers are in a 6-team Association and registered two wins in the Semi-Final (27-9 win) and two draws in the Final (12-21 loss).