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What stuns me about all the MoP threads i've skimmed thru is the lack of reaction to the removal of flying until level cap, where you will need to repurchase flying skills.
Personally I don't see how alot of Cata content will be doable without flying leveling up new toons (and it sure made BC and WoTLK more tolerable).
Also, across my account I've probably spent over 130k easily on flying skills and I'm not liking that that gold was wasted come MoP. No mention of reimbursement either.