Yeah, it seems a bit silly to me to purposely use skills you don't enjoy or have no skill at (ie. switching from heavy to light armor), so I've never gotten any characters to level 81. My highest level character is 60-something.
Thus, I really do like the idea of being able to continue leveling by using skills our character already uses. But I don't quite see the point, if enemy level caps aren't also raised. As it is, my character is so OP at level 64 or so and Master difficulty that leveling further would just make the game even easier, and less fun. Ah well, maybe I'll crank it up to Legendary difficulty when 1.9 comes out, and see if I still feel leveling further is useless after that.

I could be surprised - you never know!