I don't see the service ever returning to prior pandemic frequency. One of the best long distance routes will soon be a distant memory.
Counting your chickens before they hatch isn't wise, but neither is counting all your eggs as dead before they've had a chance to hatch.
Amtrak finally got funding worthy of the name in the middle of a pandemic, and I don't think it's as clear as it is in some people's minds how much of the present situation is covid-related shortages (including knock-on supply chain issues) and how much is lingering cost-cutting attitudes. IMHO, the tendency to attribute all of Amtrak's present woes to the latter is not productive and more than a little wearying. The woes themselves are wearying -- nobody's
happy about five-day service even if they think it's a necessary evil at the moment, and the recent parade of weather cancellations is disheartening even though the storms really are that bad -- but reading them all as signs of malice or incompetence is more so.
I know Amtrak has made decisions that people don't like, from flex meals to thrice-weakly service and more. The attitude among many rail supporters seems to be "Show me. You've got money now, prove to us that you can make different decisions when Congress isn't on your back and you're not constantly sweating the bottom line." But it's a confounding factor that right now is not the time in
any industry to be expanding or spinning up.
I would note that the same Amtrak that agreed to the new Crescent schedule is fighting railroad opposition to get Gulf Coast service going. I would also note that, other than canceling one of the Silver trains, the only service still not running at all since Covid is the Adirondack, and I doubt anyone thinks New York State is trying to discourage passengers.
There will be plenty of time to complain if the covid situation improves and labor and supply chain issues get sorted but Amtrak is still running long-distance trains five-times weekly or hasn't restored traditional dining to all long-distance trains (as they did on most of the Western trains despite, as I recall, considerable pessimism among some that they never would).