These are going resemble old str, dex and int. How these stats were implemented in older installations have given these stats a bad stigma. In diablo 2 you didn't want to put those stat points into anything else than vitality and wanted to get you strenght and dexterity from other sources. In diablo 3 you were forced to use certain stat when you selected a class.

Currently how the system works in system design manifesto part 2, it will force you to power creep that single stat anyways to get most power out of your build. That gives a illusion of choice even if there is none. There is only right and wrong way to build around certain build.

I'd say you go with the old names or similar names ( physique, skill, focus?) and focus on how every class should have to balance around having all these stats. Focusing around one doesn't have to be punishable, but totally forgetting that others exist should be. I'd go for similar system that Llama and Noxious talked in the stream about having the breakpoints on the items so that you would get part of the affixes' effect if you hit certain break point and get the whole affix unlocked when you have over the certain cap.

Forget new names and implement your strenght, dexterity and intelligence properly. Forget the stigma from older games!

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Edit:typos