If I update the server to 1.4 that means we are stuck in Vanilla until hMod updates. Meaning No cuboid, No Worldedit, No moderators, No nothing.
And besides that I would also have to switch worlds temporarily to protect everyones hard work from griefers. I do believe other users would rather stick with 1.3 rather than updating the server client to 1.4 leaving our server defenseless.
If you have a problem with this, Find another server. You are expendable. (You can also quote me on this <3)