A really easy fix for most of the issue here could be that each level rewards both an attribute and a focus point, and that each attribute point should lead to a general increase in addition to faster learning speed:
- Vigor: More HP and a small general increase to all meele speed and damage
- Control: A small increse to all ranged accuracy and damage
- Endurance: More Smithing stamina, and a small increse to running and riding
- Cunning: a small increase to all connected skills
- Social: a small increase to all connected skills, and a higher success chance on Barter and persuasion
- Intelligence: Faster learning across the board for all skills, even those connected to another attribute and a small increase to all connected skills.