Well, it's more that no-one can become a Servant for guns, because skill with them isn't all that impressive (the only Servant from modern times cheated and made a deal with the world, [i]and[/i] is actually pretty weak for it, [i]and[/i] doesn't have an NP proper), so no-one can become a Servant for guns. If Zero Berserker is more dangerous with a sword than any type of firearm, guns aren't overpowered at all.

More bothered by a boost to NP strength if someone represents an 'oppressive' ideal, because conditions like that are more or less [i]always[/i] fulfilled with the sort of logic Servants run on.

Also, I think Nature of a Rebellious Spirit should be a lower rank, since... you've got it high enough to counter the sort of Charisma to rule a country. He wasn't [i]that[/i] disruptive.