Actually, you can kill entire Bronze Brotherhood in at least one route and regent gets what he deserved in every single one of them.
Actually, you can kill every Archon but Sirin (can't say can you kill her). I mean, that's not a proving for Bronze Brotherhood or regent being more punished.
All that nitpicking aside, I'm not sure what you guys are trying to prove here.
Simple - "what's evil?" Is Kyros "evil" by means of modern postchristian moral? I believe so, but as I know current postchristian moral trying to get rid from such absolutist
evaluations. Is Kyros "evil" by means of world ze lives? Nope, just moderate level - not her moral fault she have better abilities. Is Kyros "evil" by, let's say, antiquity era? Don't believe so - we have Carthage salted for example, and Spartan children killed.
Real question is "would be that world
better without Kyros". And it's, well, not so easy to answer.