I don’t get it, I don’t see the benefit in splitting each stat into three ones. It makes the system extremely unflexible, because adding a new stat would require three versions of that stat, all acting differently. I also don’t get the racial base, why would the origin of the stat change its effect? I think it would be better to just keep the normal stats and add new once that fill the function of the mental/physical/racial not provided by it, if required.
So physical/mental/racial health could be split into health, sanity, disease resistance, poison resistance. Strength into carry weight, punch force, jump height. If wanting to split the stats, don’t just slit them into arbitrary mental/physical/racial versions nobody understands the function of without looking them up on the games wiki, rather keep their name clearly tied to their functionality.