There are other issues attached with layering.

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Such as how it affects World PVP, See attached clip:

https://clips.twitch.tv/TallSaltyPonyDxAbomb

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Oh you don't play on a PvP server? So why does layering matter to you? Well consider this:

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Additionally, your also going to be affected in a way that you may not be initially able to perceive. If all it takes is some "coordination" to abuse layering for the farming of high level valuable resources like Black Lotus, Thorium Ores, or Devilsaurs, you have to assume Gold Farmers are already paying attention on how best to exploit this for monetary gain. They can simply exploit this for the said period of 4-12 Weeks and stockpile resources to the point at which layering is phased out and then destroy the natural growth of a WoW sever's economy by simply having "coordinated" a method in which they amassed resources to the point in which none of your shit will sell on the AH because they control the supply and can undercut you. Suddenly, you might just start "whinging". Maybe not though, perhaps the way you play the game is not affected by these factors. But others have concerns that you aren't really taking into account