This thing is a huge boondoggle when we can't even get HS rail between Texas two largest metro areas, Houston and Dallas/Ft Worth. There are many more productive ways to spend 32 billion dollars. Even the cost of the study is a waste. The only viable part of the plan is the I25 corridor down to Pueblo. After that a conventional LD train once a day is all that is required and few would ride it. El Paso is not exactly your most popular destination.
A better prospect is a LD train to connect Texas DFW area with Colorado or extending the Heartland Flyer to KC. The Amtrak system is totally lacking in north-south connecting trains. A Texas Colorado train would of necessity use the joint line from Trinidad north. So it's feasible to join it there with one from El Paso and ABQ.
Well, I think the main advantage of the route is political. Its one of the few viable routes in the Mountain time zone. Cato institute likes to talk about how unfair all that is. Phoenix happens to be the best situated city in the US for HSR, having no less than six good destinations and the largest city in the U.S. with no Amtrak service. However, they are in a Libertarian coma over there so....Denver, which is a particularly poorly situated city for HSR, but with a population that is very jazzed about the service moves ahead on the list.
I'd view it as two separate HSR lines. El Paso 'Cruces Albuquerque, and Denver, Colorado Springs, Albuquerque. It would work, its far from a train to nowhere, but its not an optimal route.