I would think that a WW1 arena could be made properly interesting just by setting up terrain and base distances that were appropriate for the equipment...just like (arguably) the current MA. I can't see, however, how it would be any worse a furball than the current MA. We could even include balloons (Bloons, for youse in Philly
) for observation, maybe.
The tanks are, I admit, a tougher nut to crack. Weak, slow and inaccurate...could be hard to find an engaging gamplay mode. I'll leave that to the experts at HTC to sort out.
Would be kinda cool to have two such distinct choices when you log on.