In reply to arose:
Well, I have been working in the outdoors the same amount of time, have also done many, many munros (just finishing third round, and have done many of then many, many times, and I would have replied almost exactly the same thing. My go-to is a ME Tupilak and Berghaus Paclite trousers.
In fact 'arose', I would have used the same words!
I think expectation is an issue - In our climate, even the very best materials, (and I was a gear tester for Goretex for some years), you will get condensation, leading to damp, even wet feeling base layers. BUT, they will not be as wet as if you had substandard gear, or nothing at all. In Paramo, you will be initially more comfortable, but on a longer day of torrential rain, considerably less-so in my experience.
Warm and damp = Okay
Cold and damp = Not okay
Best of luck searching for Holy Grail