I know you are targeting for switch and controllers mainly, but as far as keyboard is concerned it is difficult/ not intuitive to use skills with direction especially for doing it to the right with "D" and using "F" and "E". If I could suggest just having it use the direction facing or the last input direction. Obviously this is your design choice.
J/K/L are alternate bidnings for each of the abilities. I've had a lot of trouble with key limits and missing inputs on keyboards to put too much work into it. I seriously lost an entire afternoon thinking I had a controls bug only to find out it was a hardware deficiency in my keyboard. I'm certainly not against adding some sort of system like that for keyboard players in the future though.