It is kinda fine how it is, counting all boni together you can cut a lv. 40 heroic down to 4h to 5h afk leveling, seems still decent,Yes and no, I do leave my pc on leveling and its not a huge problem for me. However people that cant always leave their pc on disagree with both of us. I made the post because of the fact that i have friends who share a pc or just their pc will overheat if they leave it on all night.
and It's not like you replace familiar seals on a daily basis, you got enouth time to level them inbetween gearing up.^^