Gonzo, all the points you raised were good. And I certainly ran into all of them during the progression of my ATCO career. But, although this equipment does enhance the assistance to performance of the ATCO's task, it surely also makes it harder to actually do the job safely in the case of multiple TWRs being controlled by just the one ATCO. I do not think that new equipment (as you mentioned) introduced in the past served to make the task harder for the ATCO.
I can accept that it does enable this "multiple TWR controlling" to be done, but I seriously doubt that , in an overall sense, that in doing so it is enhancing safety.