We did 10 melee-only scouts. (milk allowed)
And we won.
It was glorious.
It was fun because you could be anything you wanted to be, the extra 4 people on the team would pick up any slack anyone else might be having.
Like go super pistol gunslinger engi. You cannot really do that in a 6man MvM unless you want a hard time.
I think I was in on the 10 melee only scout run, if I remember right.
Another reason to get an MvM hell set back up is the custom maps and waves. There are plenty of new maps up since we last had an MvM server. I see no reason not to have one, especially with Halloween coming up.