Monahan and his people must have been petrified over discovery and the discovery depositions coming up in the anti-trust suits.
With respect to discovery, it's important to note the predicament the Tour had put essentially all of its partners in. In addition to the entities themselves, the primary contacts for all parties the Tour does business with are forced to respond to discovery and/or be deposed in connection with the suit.
Putting all of your business contacts in that position is no small thing. The time, expense, and aggravation of responding to a lawsuit where the liability is massive and the Plaintiff's are well-financed (and also partners of yours) is significant. While some of those contacts are entirely secure in their respective positions, some of them are not likely to be. Even if you assume the Tour and its partners were beyond reproach- which is a healthy if- it's a decidedly unwelcome state of affairs for the people at FedEx and John Deere and the like. All the while, the Tour is desperately trying to drum up money and sponsors.
Conversely, while the Tour earned the right to discovery as to PIF and AL-Rumayyan- assuming a favorable appeal- the scope of that discovery is limited to matters related to antitrust actions and contract interference. None of the 9/11 or Khashoggi stuff was going to be discussed.
With only a quick look, I haven't been able to dig up any good discussion with respect to the litigation, but I have a very difficult time seeing any scenario where the lawsuit wasn't a much worse proposition for the Tour than for LIV, wholly apart from the merits of the suit.