I was thinking from the point of view of a part-time driver who was driving to work already and using features like destination filter, and picking up the full fares that Uber/Lyft currently pay for UberPool/Line.

Now there appears to be a lower tier that Uber is pushing for to drive down payments even more.

From the passenger point of view, it's similar to an UberPool and slightly discounted. Based on previous Uber behavior, it will probably be significantly less pay for what was a career driver, and, as you pointed out, better than nothing for those drivers who had empty seats.