I think the big thing to remember here, is that they could balance things accordingly. I feel archers should really have the ammo-weight reduced considerably at the very least, and at least the charger horse variants should be able to run over more than a few people at a time like they used to(these things were justifiably nerfed for current battle in my opinion). Having a functional motf would give the devs a logistical constant to balance around.
Having played in servers with an early motf set in both scrim and casual settings, I can testify that ranged would still play a huge role in inflicting initial casualties and extending their attack power to the targets that really need to be hit, the latter of which I think should really be a much more important part of being ranged than it currently is. Battle in it's current state, quite often, is so much more about locking as many people out of interaction as possible than it is anything else. When this topic comes up, this seems to be the most common criticism, that "you just don't want ranged to be able to do anything". Quite the contrary, I want ranged to play a much larger role than it currently does, not just "don't let anyone come near me, THE END". I also don't think people realize how effective flanking ranged is while a perhaps smaller, but hopefully more defensive infantry group denies cap.
Seriously, if something like this were to be implemented, a huge group of my real life friends would almost definitely start playing again. I have a feeling that many people feel the same way.
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