The range is too long from whats been seen, which is where a lot of the problems come from. This has been a reoccurring problem with changes servers make regardless of what weapons, as range always has very big ripple effects. Long range / high damage daggers are a very old concept, but did not have the very low delay as FGs so they had some balance to them. If they are fast and hit hard then they should not be overly long on top of it.
For now a compromise that Moh suggested with a 15 damage rusty dagger can be trialed. As that would be the easiest to implement with just a zitem change if people using them abide by the community rules. Beyond that, if it's still too busted then a Katana/Kodachi only option would be beneficial going forward which I suggested in the first post and title. "Give glads the ability to ban them in game creation".
If FG wanted to do anything further to enforce standardization that glads use that would take extra coding like the now defunct server CG to override HP/AP values and damages for all players to have the same equal footing, similar to how vanilla mode works