We are literally speaking of radar that's just 1-3 clicks bigger than the view range so that the blip can show in around the time unit would enter the view range. Thinking that it will make radars and scouts useless is just laughable. Even more when we can compensate them with those 1-3 units of range.
Also it would require not buffing units that NEED radar to work, like hoplites, auroras etc. It's just one way to try skirting around the vision problem while also making sure that cybran ACU doesn't get utterly nerfed into oblivion.