I've noticed a lot of Arena redo's are being/have been made and had an idea. What if the arena could be varied? I'm seeing a lot of pitfalls and traps being placed in them. Why not make a mod that incorporates them all, but have it varied each time you enter the zone. For example, during one fight, you have just the plain field like vanilla, but the next fight there's a pitfall with spikes in the middle. The next fight has a lava pit, and the next has the dart and other traps in several locations.
Also, what would be nice is to include Arena Alive because not only does it bring more in the crowds, but it also brings a variety of them rather than the same vanilla ones.