Alpha I can't comment on the bjcm but in general I think parent v forward facing is about your preferences and what the baby likes. I think many babies don't care and get used to what they have from day 1, but some do seem to have a presence. My DS definitely preferred to face me and we didn't face him outwards until he was a year old - now he loves looking out. When I chose a pram I wanted one that could do both. I have to say, I miss him facing me as I used to love talking to him!
I have the easywalker mosey, which meets most of your requirements except the one handed fold. However because it's so lightweight and compact I never needed to fold it on transport. You can push the handle right down so it doesn't stick into the aisle. On the tube it sat neatly by the door, not in the way. But if you really think you will be folding it a lot, you definitely need two hands. TfL published an article recently about the best buggies for London transport. The BBC reported it so it should be easy to google.
Dozy I completely agree - double buggies are much more difficult than singles!
No alcohol here in last pregnancy and none this time. I just don't want it enough to want to take the (very small) risk. But most of my friends have had wine throughout their pregnancies, so I think it's a question of what you're comfortable with.