Then why are you playing it?
Noone has to run MoS 400+ times; players from method's main roster stopped after paragonning a couple times. Just because some idiot EU dk sat down in front of his pc and ground to 54 doesn't mean you have to. Noone in any sort of mythic guild with any sort of good leadership/history has ever benched someone for getting a shit legendary, ever. Sure, players have rerolled to more fortunate toons, but noone has ever been actually forced to sit out of any good guild's raid.
RNG is fine as it is. If you want 850+ gear, do EN normal+ If you want 880 gear, do it on mythic. Just because you have a minuscule chance of getting something amazing out of a low level instance doesn't mean shit dude; people been getting screwed out of drops on personal loot since personal loot has been a thing as well, and personal loot was something the community itself requested.
People who want to do nothing but M0 and LFR and WQ with the hopes of getting a 895/socketed item are selling themselves a dream that will never come true
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People who do those things do them 100% on their own.