Is there a chance we'll get outside of this increasing focus on characters mostly depending on one ability? I guess this would be hard to fix if one would just concentrate on the skill system, as everywhere else it's perfectly fine to base everything you do regularly on CHA/INT/WIS etc.Going back to the clarity example, if the basic rules fighter is a basic STR fighter: That fighter needs to be able to do things with their STR outside of combat.
Or are we talking about "needs to be able to do things, and be the BEST at it"? That's slightly different, as even with a "secondary focus" (INT for the tactical fighter, CHA for the leader etc.), you'll have people in your party who are better at that than you. But assuming the fighter is the best at STR, they could get more spotlight with non/combat skills/actions based on that.
I'm just not sure we could do that without redefining the meaning of e.g. STR and CON…