In a nutshell, a law passed by Congress enabling development of specific performance metrics to drive enforcement of OTP regulations was found to be unconstitutional by the SCOTUS, and so here we are....
All of the regulations from previous exercises are still around regarding granting priority etc., but lacks clear cut enforcement mechanisms at this time. The enforcement mechanisms, such as the ones that exist, as described by neroden and others, are apparently considered to be too onerous even by those that have a standing to try to use them.
So the only issue is that Amtrak can't be a part of determining the rules and/or deciding if they were violated. So if the STB set up the rules with equal participation of Amtrak and RR representatives to hammer it out (or without either of them), then the STB established an independent committee to decide when Amtrak complained of being delayed by the RRs or the RRs complain that Amtrak's own problems are delaying the freights and set an appropriate penalty, this issue could be put to bed w/o new laws and would meet court requirements?
And, if the government took over the dispatching and then gave it to a third party to manage (ala FEC and AAF), then it wouldn't need to buy all the track?
Just asking.