I watched the engineers pass video and would agree, unacceptable.
Though we do not have the elevations even close we do however have several places where we have to spoil up the rpms to engage the transmission and then back off the throttle a little. I have gotten accustomed to it . Wish we had a low range.
In 2005 we took a western adventure with a 660 Rhino, a Raptor and YFZ 450 quads. The Rhino and Raptor did not have fuel injection so had to be jetted for the elevation. All 3 went up the same road to engineers pass with no issue.