One thing we see a worrying amount of on this forum are people who are absolutely certain they're "too good for LFR" and make claims that they go AFK and just receive their loot (including Legendary quest items). The worst part about this is how it's used to show that "the legendary quests in mop are just too easy."
If LFR wipes happen because of low DPS and good players not taking active roles in preventing wipe mechanics, shouldn't the obvious solution be to have AFK detection start keeping track of how many times someone is AFK in an LFR, say a minimum of 10 minutes, then on the third strike they're automatically locked out of every boss in LFR for the next week.
You don't contribute, you don't get your reward. Simple as that.