So... a single guy can't poison a water supply or burn the food stores, causing the Army to disband? Or a single guy can't, in the spirit of dragonslayer tradition everywhere, stab a dragon in just the right place?
All that said, the rules start getting really confusing, really fast if you create specific exceptions to them based on trait, especially since the only real benefit of doing so it to appease thematic sensibility created by the source material, rather than the rules themselves.
I can appreciate limiting confusion in gameplay. And yes, my preference is pushing confusion for theme, as opposed to pushing confusion for supporting mechanic permutations in the official rules. I'm not advocating for an Army/Deadly change in the rules, I don't in any way want to impact the official gameplay, I'm just testing the waters on what works for people on thematic play.
I really dig GoT:LCG in many ways. But making "Spike" decks or (in the case of designers) Spike gameplay that optimize results and ditches the rich theme is not one of the things I dig (I prefer Magic for that). I've been pouring time into an alternate format for GoT:LCG (based on balance, theme, and general audience "fun"). And for that (and it's core Gameplay), GoT:LCG is a gold mine for me.