I don't know if this has been mentioned here before. I think that the current arena favors players that start second because of the whole party -1 skill cooldown VS the first player that only get to hit/move first ONCE. Is there some mismatch here? I'm unsure about the stats but I believe the dev can easily do an analysis on the first turn vs second turn win rates.
Suggestion
1) Second turn player get fixed stat buff?
2) Second turn player get to hit/move 2 times once after the first turn player move/hit.
I'm not an arena veteran so all the arena pros please feel free to give input.
Edit: I forgot that its turn based so maybe it will even out in the end?