> In that case, firing the "coordinator" person increases velocity because parts of the business processes they prop disappear.

So you get rid of the coordinator. What then? Does this magically unblock people?

Let me frame this differently: if coordinating teams creates as much problems and impedance as you claim, how come Uber hired them to begin with? I mean, either Uber was shooting itself in the foot then, or it is now. Which one is it?