User blog comment:Jimeee/Skyrim 1.9 beta update adds Legendary difficulty and raises level cap (Updated Apr 8th)/@comment-68.42.246.83-20130322162330/@comment-5469467-20130324055027

I think I see what your getting at. If the Legendary skill machanic lets you level indefinitely, you pretty much get unlimited perks. Even so, I imagine that re-specs would be useful for changing perks in skills that you don't want to reset (such as if you use it a lot). In that case, it would be better to make skills you don't use as much Legendary in order to level more. That makes a bit more sense now.