I've only skimmed the document, but I like the direction they're going on with the higher level of abstraction and the morale checks. The only purpose of a specialized mass combat system is to resolve things more simply than the regular combat system is when you scale it up to thousands of units; when it comes to a huge battle, a DM will always have the choice between resolving it realistically in painstaking detail ("these dragons beat these slaads, and I think these orcs would run away instead of engaging the dragons, and these mind flayers would ambush the dragon as it's going through this narrow defile, and...") or making a few rolls, ideally rolls which can be influenced by players in ways that are meaningful to them ("we just beat those mind flayers, in a very public way, so all our guys get +5 to morale!").
So I like the direction. There's a part of me that thinks one-minue rounds are too short for this, and that ten-minute rounds would be better, but it depends a lot on the scale of the combat. I'll read it more thoroughly later, but I like the direction. Unlike the last Mass Combat rules, these rules actually have a reason for existing, and I could imagine using them in some scenarios where I don't care much about detail.
