Elemental Weapons Are Glitched?

Fiel has been saying all along the client's information for making these work is intact. I'd say it's been disabled in some other way, either intentionally or accidentally. My best guess would indicate it involves some sort of interaction on the serverside and they neglected to install that interaction into the server.

No, the client shows the damage on your screen. Sunrise is correct. The damage applied to the mob is generated by the server and the client together.

The client data in the WZ files is intact, but that means nothing if Maplestory.exe is not programmed to read or interpret the value in the WZ file. If what you're suggesting is the current situation, people wearing the elemental staves and wands would be seeing much higher damage client-side than what is being applied on the server.

In short:

Client calculates
Server calculates and applies