Whether or not one knows or understands Nan Shepherd is practically no impediment to enjoying this composition, although I went ahead and viewed some of it and posted one of her poems to the
Poems Reprint Collection. The use of her poetry and get a soprano to read it is not unpleasant. What is important is some sort of movement through the mountains, and in this way analogies can be drawn to other situations as well.
I guess the use of soprano learned a lot from Gurrelieder. Also for the whole composition I don't see anything
directly related to Eine Alpensinfonie, so I have no empathy for certain magazine reviews, really have no idea what they're talking about… Whenever it has to do with climbing, it is associated with two actions, ascending and descending. The mountaineering theme may indeed be exciting.
It only has a parallel relationship with Schoenberg etc. but not Strauss.