I think it would probably become “2X” in that case, given the “exploit” and “exterminate” parts. :P
Against the Storm is sort of a citybuilder/ 4X hybrid, that’s all about a bunch of fantasy species (humans, beavers, lizards, foxes, and harpies) working together to reclaim the world from this (un)natural blight.
The Bustling World is an RPG/ Citybuilder/ 4X hybrid that looks pretty interesting, but is not out yet.
I can’t really think of a 4X that leans towards the Grand Strategy side, that isn’t pretty combat-heavy. Distant Worlds: Universe can be played without focusing on combat, but it’s definitely still there.
Truly curious, what did she do that was corrupt and/or racist?
I mean, it’s got to apply equally to everyone. Not everyone may be open to, or able to be reformed, so some will need to be kept apart from society, but you can’t apply a different standard of justice based on how you feel about someone.