the P47 needs to have the rockets land closer together so it hits medium tanks facing it headon for consistency. if it also needs a nerf/fix in some other area that's fine.
stuka CAS needs to do less damage and/or be at least somewhat avoidable.
IL-2 CAS needs a damage buff and to figure out what its purpose in life is.
but if we apply your idea then p47 have advantage because they have 2 planes...so 2 stuka and il-2 that would be more unbalanced,other option only 1 p47 that will make it weak,i think it is fine as it is now just need to something about p47 attacking out of radius and the il-2