Well I personally feel national troops should exist within most of the game. Since most national troops do not compare or equal the power behind most summoned troops I believe the national troops should provide a different use within the game.
Instead of weakening summoned units maybe Illwinter has planned a way to make national troops provide some other bonus(es) to other aspects of the game. This way national troops will be used beyond early stages of the game.
One suggestion I listed was that national troops would provide a special bonus to province defense when national troops equal the province defense... thus gamers would be interested in buying national troops throughout the game.
Again : an "armanent" school of "magic" to research could allow better, beefier, troops. Imagine : Ulm researches "Black Volcanic Steel Armor" for its troops. Caelum researches "Mechanically Winged Holy Wingless" or "Dirigible Mastodons".
Hell, shut up wolf, write your own game
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Wormwood and wine, and the bitter taste of ashes.