Capn Bloggs, the Class G airspace trial was allowing us to use radar for the first time in what had previously been flight service airspace, where the flight service officers were not allowed access to a radar screen.
In relation to your question, “Why would a tower have made any difference?” are you really suggesting that by bringing in a mandatory radio and transponder requirement at low levels, we can get the same level of safety as a tower with approach radar? I hope not.