Not at the moment. The Simugraph setup for the brakes was changed and DTG is uncertain whether pre-Sherman-Hill rolling stock is compatible. It may happen down the line but you should assume it‘s not happening for now.
Is it the change that originated from developing the steam engine simugraph? I wonder if it also resulted in some performance improvements, which is the reason they can finally include 100 car trains.
Don‘t think so, but I don‘t know either way. Matt mentioned the independent brakes now applying on all locos as one of the changes instead of only the one you‘re in.
Independent brakes work on driven loco formation even now. (Sand Pach, Clinchfield...) The brake change I see in preview stream is that Intial Reduction for Auto Brake is set to 84-85PSI (correct value), on SPG is initial reduction set to 80PSI. (from 1:47 in video)
I do not understand the technical things you all are talking about but hearing that this freight route comes again with 2 locos is a bit disappointed due to the amount of UP locos we already have in the game...