I made a kind of homemade beer. (I am pleased to share any detail that someone deems necessary or even the whole class if it is not against the rules). It is a Cha-based class that, for reasons of taste, has a variable secondary ability (it depends on the subclass). One subclass uses int, another uses Str and the other uses Wis.
I have been struck that two of the subclasses suffer from not being competent in any of the "big three" / "strong" saved (Dex, Con, Wis) while all classes 5e get a "big three" saved and one from the other saves, and therefore my class is at a disadvantage in defense 2/3 of the time.
The class gets a feature at level 11 that allows you to gain advantages by saving runs with a skill of your choice for a while, but it is a one-time thing for a short break and you don't have access to it from the 1st level to the tenth level
For reasons of taste, the secondary skills and the subclass saving skills of my class cannot be changed absolutely; Those two subclasses are stuck with the fact of not having "three big" saving skills. How else could you compensate for the disadvantage this creates?
I have thought about raising the advantage function of saving from the 11th level to the 5th level and trusting that monsters with low CR do not have too many AOE / save attacks, but that seems to be a really powerful feature for the 5th level and I am not totally convinced for the idea.