All they need it to release a book to organize several factions, so you can mix Aelf without great disavantages. High Aelf right now have several small factions, some that play well like Phoenix Temple or Order Draconis, but are very restricted because of battlelines. A reorganization like they did with Undead would work wonders. High Aelf have a good pool of miniatures right now, we just need to be able to group then up.