It is not simpler to code, which may be the very reason it is not in place.
To give players some idea of the scale of this, imagine if relic spells, instead of being turned in, just dropped a random single relic spell. Then imagine every class had 6 of them including meeles.
That is basically what we are dealing with. In a system like that, it wouldn't be surprising for a guild to progress through the relic content and never get crucial things like JB and Raego, because they are 1/90 drops, and no matter how many times you rot RBOW and Shaman Stats, and a million other relics that people already have, your guild is essentially screwed because they didn't have the fortune of JB and Raego dropping, so they are weaker as a whole, and are forced to endlessly farm relic content and rot the loot because those spells are so important. They screw over any lower tier guilds in the process who actually need that loot.
Then think what happens every time someone quits and a new player needs their relic spells. They don't just need you to go farm 5 relic drops, it will take 90 drops on average for them to get their 5 relic spells, because 93% of the time it is a random rot spell for another class that has their stuff or isn't even on the raid.
Now, it was kind of understandable for a while, because it is tedious to code this sort of thing, and the bleeding edge high end content isn't a priority, but that was years ago, and for a time we had a makeshift system where we were allowed to just trade in rot tomes through GMs.
But now there are multiple guilds in turuj, and at this point, multiple active raid guilds are a huge portion of the player base for the server, and they are all fighting over this content, and a large part of the time all the loot just rots, because guilds are just trying to get tomes for some of their new (or older and unlucky) players. On top of this Vitali did the leg work so that it would not be a tedious boring process for a Dev to implement.
It is absurd that it has not been implemented, or at least received some sort of Dev response explaining the situation, because its a big problem with a simple solution that impacts a large portion of the player base. I absolutely love this game and it's community, but seeing situations like this makes me wonder why I still play. Sometimes it seems like powers that be just don't want the end game to be functional or for any progress to be possible (OG boss with bad loot being made impossibly hard, thaz 1/2 being beaten and loot never put in game after promised, widespread nerfs without any rebalance to made effected items appropriately desirable)