Rested experience will never be that grate so it will help any casual gamer to keep up with the rest so for that reason it's pointless. Only time I have seen rested exp have had any impact is when you're leveling multiple alts at the same time.
Having rested exp for the sake of having rested exp is also a bad idea. I hate to out level content I want to do just because of some exp boost system. I want a level lock in that case. And yea I give a [censored] about low lv PvP so I don't care if you QQ over twinks because of a level lock.
However if there are rested exp in the game I won't quit playing it. But it's pointless to have as it does not do what it is meant to do... help casual players. And if it did help casual players it would just be a instant max level button witch would just ruin the fun of the game.