It's easily forgotten that on the TV table, the event was on live television in Europe, so there were scheduled commercial breaks every three racks in those matches.
On the outer tables, there were definitely some abuses, but when there is an area ref only, it is not so easily controlled. Agreed that it's a problem, but to be fair, the schedule was never badly compromised at this US Open, so I'm not sure it is a big problem.
I don't feel that match lengths got out of hand beyond day two of the event.