Awesome stuff Peter! It's always great to feel that progression. Switchbacks were something I was weak on when I moved out here as it's something you just don't find in the UK (except at Jedi's training ground!) and I've really felt the improvement myself.
Don't worry about having pedals level on the really technical ones - that would actually be my advice. Outside foot forward is best. As a wee bit of a more advanced technique, you can come into a technical switchback with your pedals level and outside foot forward then, as you pass the apex, make a quarter-stroke with your pedals. This returns you to the classic "outside foot down" position, it gives you wee bit of a momentum boost just when you need it and it can help break the back wheel loose if you need to.