Hey don't worry about it, taking hiatus' is usually good for me and has worked in the past. Usually I take one when I start to feel reluctant to look into Arena fights because they've lost their enjoyment for me for whatever reason, often that's due to a gradual shift towards arguing and competition over story telling (I am incredibly competitive, even when I would rather not be, or perhaps I just get less interested in the arguments, also possible.) or just because I feel my writing is getting more and more forced and even worse than usual. 

Also as arguments go this one is far from the worst, I've had some pretty legendary ones in the past. Unfortunately it's one of those disagreements which are pivotal to a fight, similar to me and Khan in the tournament, so an impartial decision is necessary. No matter how agreeable someone is, they're unlikely to turn down an opportunity to win, and unlikely to accept a significant chance of loss, based off the other's arguments.

The problem with your coin toss idea is that it would require me to abandon what I think is logical. It would be sort of if we have a coin toss to decide which of two arms were broken when only one arm was hit. I think either Pollen or Innue should look over the conflict, judge if more damage should be taken, and if they decide in that situation more damage should be incurred then a coin toss would be fair.

Also, if it weren't for the whole basket-ball move I don't see why you would be disappointed in the right side going down, all of the Mech's more powerful weaponry are on that side, so using them would be far more difficult.