I wouldn't put it past BNSF to pick up Hinkle because as was mentioned it's in a prime area and could really help their Company. I think that's the core issue with the UP and their coming late to the party approach on PSR.
Their major hubs are all in proximity to other railroads who could easily eat up their customer base driving the Company's stock price into the basement (can't live off free tax cut money forever).
Buffet has always been good at the long-game and I honestly would not be surprised that once the ball drops on the UP and they lose their customers right along with the thousands of people they furloughed that BNSF and possibly CN comes in and picks up the pieces.