I know the longer you hold the button down the higher level of that spell you will cast,
I have not seen it in the settings to my knowledge, but would their be a way to tap the button once and tap again to cast at a certain level or if you tap it once and the cast bar fills up to max level it will auto cast at max level. This would be very handy.
I think they should just classify the spell activation better
Classification
-Instant
-Channeling
-Charging
What your saying is a Channeling and Charging Hybrid.
-That takes out the point of having a Charging skill
-Might as well get rid of charging, and make everything channeling if you’re going to have such option