[love crime]

Personally, I think the strength of SCs, summons and high magic in general are exactly fitting with the theme of Dominions 2: achieving godhood. Although it shares aspects of it, Dom2 is not a historical combat simulator. If it allows for godlike beings to take the field and slaughter 1000s of mere mortals, well, that's because the game centers around godlike beings.

Like other people said, if you want to play it as more of an army simulation, find people who want to play it that way with you, and use the settings that make the game play that way. As far as radically changing the default behaviour of the game: well, that would be a whole different game you are wanting to play.