The biggest issue with Arena was the host side management of it.
It required extensive host side intervention.
We were in discussion with Anubis about building a program to
manage everything that happened in game host side.
It was to be able to determine winner based upon conditions and
would adapt from phase to phase. It was going to be able to modify
the data files for ships / weapons etc. (phases, conflicts, evolution)
It was going to do it all without host intervention after turn 1.
Very cool conceptually, but real life (for all three of us) killed it.