At this point player should be able to easily get legendary item every week. And I even think that there is an easy way to do this - just make mythic dungeons, raids etc. drop something like Writhing Essense and after getting 50 of this currency you should be able to complete weekly quests that gives you random legendary for your spec/class. Every other method of obtaining legendaries should stay as well to speed up the process. With this, making alts would be far less of a nuisance and if someone was unlucky with his main for the whole expansion he can get desired legendary quicker.
Thoughts?