What load of codswallop. Now we'll have every dogsbody pilot peering at their ADS-B In screens and asking ATC "is that return going to miss us?". TCAS does not require ADS-B, only a transponder (Mode S best). ADS-B In in busy CTAs/zones will be a distracting nightmare for crews.
Every pax jet is separated by SIDs and STARs, with either lateral and/or vertical separation. That is what is required here with the choppers. Playing TCAS dodgem-cars below 1000ft when you're trying to land is not the way to go.
Point 3 is the only one that makes any real sense. The rest sound good only to the great-unwashed.