Yes they are old but easily settled and customizable. If i want to set keys for inventory or new keys i just go to the CustomKeys.txt and change there. Same thing for spells. But everything is already settled and you don’t really need to change anything. It’s very simple and straightfoward.
PS: If you just want to keep the beta input options settled for custom keys change customkeys=0 to customkeys=1 in war3preferences.txt. This way you don’t have to go to options to change the input from classic to custom, everytime you start the game.