I think some people need refresher courses on the basics under 50.... even if they are 70....

Even so, I don't think we need to keep level 70 spells under 50. What about those that arent 70 yet? If youre bothered by not being able to use 70 spells...run 70 dungeons. problem solved.

I quite like losing spells/abilities personally. brings you back down to the basics which is never a bad thing.