How come you just don't make them comparable to level 99 ah weapons. So people could you know actually use them. They shouldn't be as strong as a relic or empyrean obviously but why not just give them stats similar to something you can buy from the AH? That way people who don't want to do a relic/empy can make some use out of them.
There is already too many event items which have no use.
A lot of MMOs already do this if they have special event items they make them usesable but they are pretty average and not even close to the best weapons in the game. So I can't see why FFXI can't do the same after all these years.