I think the weapon lines are reasonably balanced. Where it gets less balanced is with some of the arena weapons that are currently over performing.
I use an ice staff for my magden front bar. 2H for my DK, a Bow for my stamsorc, and dual wield for my NBs. I'm sure I'd have a character using an Inferno Staff if I didn't kinda have a preference for stam toons.
For back bar I overwhelmingly prefer sword and shield these days. Most classes seem to have enough healing options where I haven't really used a resto staff in a long time.
I will say I used to enjoy using a lightning staff on my pvp magden but now I can't really see the use. So that's kinda sad. But I guess there are enough sorcs heavy attacking where you can't really say lightning staves are gone.