As the game is downloading, a thought hit me. Another advantage to a “focus” based system would be to minimize micromanagement. Instead of having to add three points in three different abilities each level (which, from how people play, are generally usually the same ones), you could focus the same three abilities once, changing them only at times of need. A minor visual indicator (an asterisk near the abilities name?) would keep the player informed of the characters focus.
I don’t know that fans of this genre would call point distribution on level-up “micromanagement”, I certainly don’t. I feel like you might be overthinking the system a bit. It’s simple as it is, and in some ways even elegant. It definitely doesn’t need to be streamlined.