Hybridization has allowed the general community to play how they would like, however, one of the downfalls is that the meta for magicka and stamina based characters is that DPS builds are bottlenecked to run dual wield/2H for every build if you're wanting to hit the top numbers. Yes, melee has an added risk in some content, but the majority of trials can be handled by Stampede to close the distance without having to worry about being so close they take additional damage because the tanks (supposedly) are maintaining aggro of the bosses and adds. This means that in trials, there isn't much of a deterrent for running melee since there isn't much added incoming damage for melee. This becomes especially true because staves do not hit as hard as melee builds for top tier DPS. An example of this is the Magicka Sorcerer. It is extremely difficult to find a 100K+ parse with dual staves because everyone is working to hit the higher numbers pushing the bottlenecked top. However, when you look at the parses well over 110K you'll see tons of dual wield/2H builds.
The difference between running staves and melee isn't noticeable enough in dungeons to make up for this DPS difference in comparison to the added damage associated with being melee because the majority of adds and bosses die in short fights.
I doubt it'd be a perfect change, but it would be nice if Wall of Elements dealt more damage to better keep up with Carve and Stampede. I'm sure there are tons of other changes that could occur, but the overall idea is that running staves just seems like the logical thing to do on full magicka build.
Thank you,
POG