The dynamics of small arenas are so different. In a 4 vs 4 arena someone with two fevers has a massive advantage. I have two thoughts on this problem.
You shouldn’t be forced into a matchup on a smaller arena without being given the option to change your powers first.
The arena should not get as small as players drop out. The 5 by 5 reduction is fine, but 4 by 4 changes everything.
Happy for this to be shot down as a suggestion as I haven’t seen any other complaints, but to my mind it creates an unfair situation if you are suddenly playing a quite different game.