+ 100
The ability to archive maps with specific features, allowing more time for scheduling and promoting historical matchups. 
If you are talking about saving the settings and plane sets etc that can already be done just by saving the arena tables.
I started archiving all the set ups as we run them, just so when we repeat them it will just be a matter of loading them onto the server.
ground targets or bridges to destroy. It would be neat to destroy a well modeled bridge. (Bridge over the river Kwai or Ludendorff Bridge.)
Check out the last page or two of this thread
http://bbs.hitechcreations.com/smf/index.php/topic,267808.0.htmlOne of the limiting factors is that it is difficult to run scenario type game play in a 24/7 arena and specific time events like snapshots and FSO are the domain of the SEA.
Some AI capability and especially win the war resets with ordered map rotation might sort of bridge the gap between scenario and 24/7 play.
The arena has more limited appeal than the main arenas and that could grow some, but the mains will never empty out in favor of the AvA.
One benefit to the game and HTC over all, is that it might help a little with customer retention.
When folks get bored with the MA this might give them something else to try instead of taking a break from subscribing.
We have a few players that have resubscribed only due to the recent changes in the feel of the AvA arena.
It seems it might be worth a small share of the overall game development.