Yeah, combat overhaul is going to be right after we finished the world map overhaul. 0 damage attacks are actually going to be somewhat normal - the idea is that a 0 damage attack doesn't do "nothing", though. But yeah, especially as it is now, the difference in stats has an outsized effect more than it should. The other aspect is that Strength and Endurance are the only things that seem to matter currently - mainly because they just about are. When there are ways to fight an opponent that can completely overpower you, we'll have achieved what we set out to do.
Endurance, in the long run, isn't even going to directly affect damage absorption. That's just what it currently does. It might have some small effect, but not the huge impact it has now.