Yes, we see where you are going because we've been there already. Like almost every 'new idea' that comes up here, it's been suggested before.
I requested a special damage type to cancel the "population killed per point of damage" ratio months ago. Hopefully MM is willing to do this and is just too busy with bug fixing to get to it yet.
The AI
does know how to use troops, btw. It just needs to be told to research them. And then has to be told to build them in sufficient numbers to be useful. The default config hasn't got to troops yet. Some of the mods might, though.