This all exists right now, all that would need to happen is some one create the missions for each terrain, and then setup the mission schedule. This is how the western front arena currently runs.
Dadtallica is interested in learning missions it sounds. I sent him some help vids I had made for Nef.
Between him, Mr.Fork, Mustang (who's docs I learned from) could form a ME cadre if they are interested.
My advice, for what it's worth would be for them to get with Nef and and run a couple of his previous FE event missions as learning. Then maybe make a couple of those and maybe offline.
Next I'd recommend them making a couple of the new missions for your staged mission tab. I think most all of those were broken anyway and that tech will be very close to what the Melee would be like with repeating schedules.
If it were me, I'd work my way up like that before testing on a Melee. and maybe just one terrain. Maybe one of the big ones that have trouble find fights, pick the most hated terrain and see if you can improve it with some missions. If it flops, they still hate the terrain, no loss.

If it helps, it might rehabilitate a terrain that otherwise causes log-offs.
$0.02.