Not quite sure why they don't include it on the email receipt. But on the plus side those old e-tickets they used to email were about 10 pages long when you printed it At least the new one is shorter!
All of my bookings (and those of everyone else I know!) no longer have access to the "view receipt" button because it's obscured by the schedule change banner. Atrocious web design, cannot believe that after all these months basic fixes like this have not been looked at. I raised this particular issue on VS's Facebook page after Christmas and was told they are aware and it'll be fixed!