There isn't one single change that they could make that would kill this game faster than the removal of LFR. The LFR players would quit and not come back, and overall raid quality would go down. As someone who has been raiding cutting edge content for entirely too long I can tell you that once they added LFR and could justify more resources because more people were seeing raids the quality of content skyrocketed. As a Mythic raider LFR is a total positive for me, it impacts me in zero negative way. It's a positive for the people its intended for. Why get rid of it? Those people are never going to do any form of raiding where the community plays gatekeeper.