Wow, I had completely forgot about this thread.
Olympic necro btw.
But you kinda got the point of mods. A one huge modification that completely affects the game, in this case, yes, hots can be taken as a mod, a very huge mod that adds to Starcraft 2. Completely modifies its engine, graphics, the way you play melee (even if it's just new units), etc etc. In SC1 mods were that. Big MPQs that compltely modified the game. And even the way you played melee, introducing new strategical concepts on how you played a single game of starcraft. And the best part of it is that you did not require any maps at all. You'd just load the mod and the changes would apply and affect every single map.
Right now, even if there is the illusion of a mod (which is just a stripped down map, really) there's no way to completely modify starcraft. You're limited to loading a map. Maps use mod files as a complement and the main point of this topic was that it should not be that way. You should not at all require any map to play a mod. You should just be able to grab any melee map and you'd be on the mod.
That's as far as I remember from ...2011???
If anyone wishes to further discuss this, go ahead, otherwise i see no reason to keep this topic alive, do not reply, just let it die, again.