Look, it's quite simple. Obey the RA, don't overdo it, don't underdo it. It tells you exactly what to do. PF does not prevaricate. PNF observes outside, monitors correct response and makes an urgent 'TCAS RA' call when he can! What is the problem? We all know frequencies can get busy. You work with the tools you have, not the tools you would like to have. A congested frequency can still be handled. The most important thing is Aviate. Correct response is all important. The Communication is not so vital. Let's not make problems where none necessarily exist!