There were no multiple runs on the same route left in the west to cut in 2005. Generally a route or area that has multiple trains per day faces a higher risk of cutting of one frequency than a route that will be left with nothing.
Also like in 1997 when the western routes were hit hard with equipment shortage upon retirement of most of the Hi-Level cars,
I'm going to dispute that losing the three-a-week Pioneer and the Desert Wind was "hit hard". It was barely noticeable. The major losses for the Western trains came much, much earlier. Phoenix was lost to unmaintained track of course.
Of the passenger trains which were running in December 1971 in the West:
-- The Coast Starlight has gone from less-than-daily to daily
-- The CZ:
---- Denver-Salt Lake has gone from less-than-daily to daily
---- Utah-California has gone from less-than-daily to daily
---- (although service via the Overland Route did end)
-- The Portland-Spokane section of the Empire Builder has been added
-- Several additional routes in California were added
-- The Topeka - OKC - Fort Worth - Houston train was lost (but OKC-Fort Worth is back)
-- but the Texas Eagle was gained
-- Phoenix service was lost
So almost entirely improvements to service. Texas and Phoenix can complain, but nobody else in the west has lost anything, net, since Amtrak started.
Of the trains in the east, on the other hand:
-- The LSL was established Buffalo-Erie-Cleveland-Toledo-Chicago
-- The Crescent went daily from Birmingham to New Orleans
-- The Adirondack, Ethan Allen, Vermonter, Boston section of LSL, and Downeaster were added
-- Detroit-Pontiac service was gained
-- Quincy service was gained
-- DC - Pittsburgh service was rerouted & DC-Cleveland service added
-- The Broadway was destroyed Pittsburgh-Fort Wayne-Chicago
-- Service through Charleston and Cincinnati and Indianpolis was reduced from daily to less-than-daily
-- The National Limited was lost entirely
-- The Floridian was lost entirely
-- On Silver Service, Ocala route service was lost entirely
-- On Silver Service, S line service in N Carolina/Virginia was largely lost
-- Frequency of service dropped in Florida
So New England has done quite well since Amtrak started -- but the Appalachians, Ohio/Indiana, and the Southeast have been screwed, and really do have a lot to complain about. Apparently it's easier to cross the Rockies than the Appalachians -- what?