A lot of classes in D&D 5e have class specific abilities that would require to be tracked, and while it's doable to track them by typing out tally marks in the features & traits box, I think a lot of sheets would greatly benefit from adding extra modules on the character statistics / spells page to keep track of class or race abilities.
Abilities like Ki points, sorcery points, and barbarians' rages would be easier to keep track of if given a dedicated space on a custom template built for the respective class.