I know we are talking about temp. buffs, and just hinting to the not direly needed fact as well.
Never said it made it bigger about the pandaren rested buff, but longer rested is just as good as higher rested.
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Not really a loss in time. Casual minded leveller can go 1 to 90 in 10 days (that is how I see it, as I slack according to some people when one RP's) Really not much time zink in levelling, more time zink in getting geared than the levelling itself.