None of us here speak for HTC, but I have always found them to be reasonable people. If a better way of doing something is presented, I trust they will consider it. They don't wake up every day and think of ways to make life miserable for their customers.
However, if there is no real problem, but a childish, love muffin method is used to whine about it (think collision thread), it won't get much attention. I'm not saying that is the case here.
The split arena concept has been here for a while now. I think many people have left an arena and not been able to return to it soon after that. The over capacity usually doesn't last very long until the arenas begin to balance again. It may seem irritating that the arena numbers will not update while you are sitting there. You have to log off completely, then log in again with your login name. I'm not sure everyone knows that and a message explaining it might help. Or, having the arena screen update every 10 seconds or so would be nice.