do you think that would be better?
Well that's hard to say, magicka had a "problem" with the spammable elements where players defaulted to a handful of combos after a while.
It depends, maybe you could do a build where you set the elements cooldown to .5 and see how that plays.
Or maybe you could lower the cooldown but get rid of the charges so that mono-elements are limited to 1 and there's no reason to not mix them up.
Hard to say, but I hope you figure it out.