I really shouldn't have to say that the basic premise is dumb, in that MC can resurrect literally anyone regardless of how long they've been dead for yet he gets executed because the Hero's have become "too strong to die" and so MC because of his ability to resurrect ANYONE has become a "liability".
When you think it through the whole "Focusing on nimble movements" thing really makes sense. Since the entire worlds enemies are basically one shot kill technology was focused towards evading attacks because tanking attacks just wasn't an option. That or I'm just reading too much into it.
I think this premise works better as a game, where you can get a better feel for what's stronger. As it is you really can't feel for what's strong other than the star system, which is also arbitrary.
Ah, the classic "I reincarnated as the villainess and so did the heroine, but the heroine is actually morally bankrupt and treats me like shit in an effort to make the prince fall for her" archetype