I'm not saying it's a good situation, but I understand why WRC2 is separated from WRC3. I don't have an easy answer. If we have 20 (or 50 like in Monza) RC2 cars on the start line, how do we decide who gets the onboard camera, and gets to be seen on the TV, when the decision has to be made before we've seen their performance?

The situation you're describing from Monza SS13, where WRC3 cars were skipped, is because Fourmaux had started late. Thus Mikkelsen, Lindholm and Solberg had started before him. For a reason or another Mikkelsen's interview was not shown, but Lindholm's and Solberg's were. They didn't have onboard cameras on those cars, and no land cameras (remember the cameramen were out in the mountains that day and it was dark anyway). Even if they had had one or two land cameras, it couldn't have covered the two minute gap between the cars. Hence the only footage they could show was Fourmaux's onboard (and turbo camera...what will they come up with next?)