Yeah about the backtracking. I meant that I never had to backtrack to level up, oh wait you mean to go to fill in the skills, yeah you are correct. I first thought you ment the linear thing. Just plowing through gained enough skills and power to beat the game. You could have it so it get tougher and you need to fight more lower enemies to progress, but maybe that would make the game more grindy and less fun, I dont know.