It takes some nerve to not only insult Amtrak management employees (which I’m guessing you’ve never met) but then also to completely dismiss the struggles faced by those with disabilities saying they should only have access to a small fraction of the facilities that an able bodied person should enjoy.
1) I did not say that people with a mobility disability should be excluded from the trains, if anything I would want the capacity rule with more of a solid definition of what "accessible" means with respects to transportation than just assuming someone somewhere will ask the question of when an accommodation of a disability becomes unreasonable.
2) I understand very intimately what a person with declining mobility and cognition faces. My grandfather towards the end of his life couldn't climb the steps to the top level of a California Car when he rode the train. So I get it. My main concern with having someone like my grandfather go to the upper level of a bi level train would be if it was safe. If he could only navigate the stairs while the train is stopped, that was a concern for me. Also, what happens if a train crashes? Is it safe for someone with an impairment to be somewhere that can't be easily evacuated? It would be one thing for me to get out of the upper level of a car, but not someone who has trouble walking let along someone who can't walk at all.
The question is, if no one is going to ask where the line for "reasonable accommodations" is and frankly it seems like it really is a "it depends on the equipment" question that we keep tap dancing around. It will be fairly easy to make whatever replaces the Amfleets mostly accessible since there aren't rooms to deal with and Siemens at least can build in chair lifts. I would much prefer hard rules over open ended questions that no one seems to ask and no one cares to answer.
If a sleeping car has to be able to navigable by a wheelchair, then there is a very clear prospect that bedrooms on long distance trains might not exist when the current cars reach the ends of their lives. Or at best, we can hope that they will but be narrower and the trains overall having less capacity, neither of which are good for rail in this country. Which would mean having rules passed into legislation saying how this must be handled. It is clear that an accessible room can be made and Amtrak at least has offered them since before it was required but is it possible to offer full access without severely hampering Amtrak or any other operators ability to do its job?
As for Amtrak's management, middle management may be mostly competent, but that only gets you so far. I have worked for companies with reasonably good middle management, but upper management was too busy chasing gimmicks or running out the back door with as much money as they could. And Amtrak's politically appointed upper management seems to be the former and it is by design. And if Amtrak's last 20 years are anything to go by, the competence of the Board and the C Level Managers makes a huge difference in how Amtrak functions. When Amtrak has had good upper management, good things were able to happen in conjunction with the states and their own routes management staff, in times when leadership has been inconsistent at best and bordering on incompetence at worst, a lot of bad can happen. And if there is one thing I learned from working for sinking companies, running on inertia can only get you so far.