I agree with that, most guild members will want to stick with the people they know. In fact, I myself will continue to remain the leader of my level 27 guild of 3 accounts rather than join some massive level 100 guild of people I've never even played with. My guild and my personal investment in it is more important to me than the benefits of a level 100 guild. Still it just seems weird to me that Turbine should force anyone to make this kind of choice. If they change the renown system too much, they eventually may just be better off giving everyone the benefits of a max level guild and making renown just that - renown, something that doesn't affect gameplay but is more like "bragging rights" (or like the monster manual, with some small fringe benefits).