I think that a turn in type of deal would benefit any guild, not just Legacy. Relics are important to all of us, and imo Zhak's suggestion isnt just for the benefit of Legacy, but perhaps every character that is in search of a highly desired relic.
The reason why one may not see as many lvl 65 spells as relics is that they're simply much rarer and profitable to market. Many vendors have lvl 65 spells, but only a few relics are ever in circulation. I see Plaguefang and other high-end droppables being auctioned all the time, and rarely ever do I see Giant-Banded Armor being advertised. Many people dont put in as much an effort to sell these cheaper goods (low-end droppables, non-relic spells), they just simply stick it on a vendor and forget about it.
I also disagree with quested relics, it does in a way trivialize them. The problem is that it guarantees that a given relic will drop in the end; relics are never guaranteed. If you read Rabb's statement closely, he says that relics should be obtained by raid guilds for raid guilds, so the fact that non-raiders must purchase their relics is not much of a concern. There are a couple of flaws comparing relics to the Bracelet of Sunbane. First off, relics are class-defining spells that provide a huge advantage over not having one. You will never upgrade or replace a relic (at least for now) because simply put, its a 'best' spell that is irreplacable. Bracelet of Sunbane, and also many other quested items, though nice, are not guaranteed to be end-all items. It does not completely define a class, and isnt worlds ahead of every other bracer in the game. Secondly, relics are much, much more rare than items. Comparing a quested good item to a quested relic doesnt hold much ground because items are guaranteed in some way or another. Each mob has a set loot table with usually 5ish loots, kill it a few times and you'll more than likely see every loot. You can pick and choose the mobs you want to kill, knowing in advance that it will for sure drop some of a few items that you already know of (assuming you've killed it many times before). The same cannot be said about relics. Yes, many mobs can drop relics, but you can never count on a relic dropping since they are so rare. In addition to this, in the case that a relic does not drop, you cant count on what relic it will be. In this sense, items are much easier to pick, choose, and 'farm' compared to spells, which is why quested relics would not be a good idea.
Regards,
Aeran