This was entirely off-topic for the “Discuss the design outline” thread so I split it into its own thread. In general suggestions should have their own topics instead of being attached to the end of existing topics.
Welcome to the forums though 
That aside, StatsThroughSkills has a number of problems.
Foremost is that it’s grossly overpowered, leading to stupendous stat levels for free as a side effect of doing something you are already going to do.
Worse though is that it just doesn’t make sense, skills and physical/mental traits are simply not linked the way it models them.
What I’d very much like to see is a system where there are a number of long-term activities available, such as calisthenics, weightlifting, running, dexterity exercises, etc that the player could perform in order to train stats, of course performing various activities like running, fighting, studying, crafting, etc would also contribute to this. Effectively the player would expend time and resources in order to improve (or maintain) their stats.