1) I think Scott J. has pointed out that you can become very fit by exercising a lot, but you won’t reach your genetic potential that way. Perhaps you don’t want to which is fine – go enjoy the mountains!
2) I have lived in the flattest of the flatlands and in the mountains. My experience is that it’s way easier to train in the flatlands because there are no distractions – like a foot of fresh powder during your rest week.
3) re: “occasional interval or ME sessions”, bear in mind that one idea in the periodised training plan is to improve maximum recruitment by doing a maximum strength block before your ME block. It’s not clear that simply throwing in the occasional ME workout is optimal – but that just takes me back to my first point.
Hope these comments give you something to think about. Good luck with your recovery from OTS and enjoy the Alps! 🙂