I am not talking about the cost of implementing it but rather the effect of doing so. Currently the plan is to have lfr drop gear that baring a lucky drop or a high mythic+ drop will be better then anything else.
Once lfr hits all the rep rewards. All the world quests and dungeons save mythic plus will effectively be made null and void. Considering the massive amounts of time put forth to extend a much more varied and longer end game to casual players isn't lfr effectively shooting themselves in the foot?
Yes LFR will have good rewards again in doing so however it will once more start the cycle of nothing to do at end game but lfr and transmog hunting for non raiders.