Since AGR redemptions are now tied to the cash fare, isn't the biggest complaint is that the cash fare on many routes is simply way too high, especially when a connection is involved?
If so, using AGR as a way to make those specific routes "cheaper" (as it was in some cases under AGR 1.x) seems like a really odd way for Amtrak (or the mechanism people would want Amtrak to use) to have that happen. It doesn't help the majority of people who look at taking Amtrak for the first time, see a sky-high fare, and decide to book travel another way instead. It doesn't help those who don't want to wait to earn points through a loyalty program (either by credit card, spend through the AGR portal, or partner earning) and dedicate that purchasing power to Amtrak instead of another rewards program or cash back program. It doesn't help those who can't afford the points, or don't want to purchase points in hopes that the redemption will be cheaper than the cost of the points. AGR, as it was before, was not exactly intuitive (especially to the value of points and how even purchasing points could make a trip cheaper than paying cash for the same trip.)
It would be much better if Amtrak would somehow use this opportunity to reform the system and make those trips cheaper and more available to everyone, not just those who happen to be "in the know" of AGR. Maybe that will happen; as rooms go unsold or can't command the higher rates (and AGR members aren't taking them) sleeper prices may very well drop for cash fare, helping everyone. This may very well help Amtrak as well, as my understanding was that the cost AGR pays Amtrak for a trip is lower (potentially, in some cases, much lower) than what the cash price is for that room at any given point in time. Maybe that revenue movement has changed as well, essentially "forcing" the change onto AGR.