Would splitting arenas help with connectivity, or aren't they all on the same server? I'm clueless in that department.
There is an alternative which has been mentioned and that is the CT Arena. One thing I'd personally like to see is the CT also mirror the MA. That is, not only make it Axis and Allies in the CT, but make setups for a week where each country has the same aircraft selection but of a limited selection....say, early warbirds...or only Pacific warbirds...etc.