In the cog wheel page on character sheets for players, it is currently not possible to change what attribute (Str, Dex, etc.) a class uses to determine spellcasting modifiers for things like spell save DCs and spell attacks. I understand that it's possible if you use the "Custom class" box to do so, but it is highly inconvenient if the class is otherwise unchanged from official class (as you are unable to use the charactermancer to expedite building the character sheet, since choosing "Custom" in class options on the charactermancer will require you to copy and paste EVERY SINGLE FEATURE of a class that the charactermancer can already import to the sheet normally).