Even if we did have more LARS etc., based on today's level of radio competence, it would not make much difference.
The same people who bust the CAS now would be so busy stamping on one another's transmissions and burbling on with the wrong squawks, mixing up runway numbers with QFE, confusing north with south (I heard all this and more today) etc. etc. that all the really useful information would be missed.
In my business, we call these people muppets.... They will always exist.