No1 you can walk up the stairs to deck seven and use the bathroom without going through the Colonnade
No 2 The Panorama Penthouse Veranda has a large shower stall and you can get three others in there with you but I only managed two others.
No 3 I agree I asked for a couple of doorstops from the suite attendant and that worked.
No 4 I heard that you couldn't leave the wine alone during the day.