Awesome train, Bill. I always liked its locomotive design. But as John stated, it was underpowered and needed a helper on the Cajon Pass both ways, when the UP ran it for a year between Los Angeles and Las Vegas and back.
Passengers complained that the cars were cramped, noisy, and not very smooth-riding. After the year was up, UP's City of Las Vegas became a single unit E8A pulling regular UP passenger cars and didn't need a helper over the Cajon Pass.
So UP officials would be wise to confine its run from Seattle up and down the Pacific Northwest coast, maybe down to Eugene, Oregon and back where there's no significant grades, like Amtrak's Cascades routing. But it does make an eye-catching and unique O scale train to run on the layout. Wish I had one.
By the way John, I just happened to notice from your above post and avatar, that you've been on this forum 9 years and now have over 42,000 posts, which works out to over 12 posts a day, every day, for 9 years! How on earth do you find the time?