
I just blitzed through the vanilla campaign with Chess mode on (no random numbers) and I think its worth discussing for Ultimate mode. My reasoning? Re-rolls.
Some things are still random (weather, heroes and chance for SE unit), but the damage output (and mitigation) are consistent. Chess mode on would require more experimentation with unit placement/upgrades/overstrength and positioning, rather than rerolling for a lucky streak.
High output/low incoming damage is basically a question of the available prestige pool (overstrenght, elite replacements), no? The way I look at dice rolls (and rerolling) is that it basically negates the prestige gains (Rommel), thus watering down the "Ultimate" tag.
And after watching literally hundreds of hours of YT action, I can safely say chess doesn't really take away anything from the game. After like turn 3 into most maps, it still requires backup plans, account for bad weather etc.