I can only talk about the route that I book tens of tickets on. LAX_JFK where for example
basic economy would be $89 regular economy $129 and points were 9000 points. So someone wanting bluebasic wouldnt be always worth to use points. or $125 for basic economy and 10900 points etc.
Now they lowered the points ratio much more so it makes sense to always use points, even if you might have taken blue basic.....
Hope that is clear enough