[quote='Memn',index.php?page=Thread&postID=201671#p ost201671]70-80 is horrible though... I wish Blizz would add some feature to reduce the levelling requirement on accounts that already have a max level toon on in.[/quote]

They did, sortta, by letting your max level guys buy the 10% XP boost shoulders ( [url='http://www.wowwiki.com/Heirloom']http://www.wowwiki.com/Heirloom[/url] ) and then mail them to your next group down.
It's not a huge boost, but every bit helps on that long grind to 80.