Personally I’d say have every window seat in place. It won’t be hard to change capacity on the ticket machines for each type of bus, which is the data the app pulls from. Personally I think it will be a great feature to keep even when we eventually get back to normal. Last summer on the A5 I came close to full and standing capacity a few times, I could see x number of people standing, but was there any hiding out of my mirror view? Previously on ticketer you could see how many have boarded each trip but no way of deducting who’s got off until this recent update.
The social distance sticker says additional capacity at driver discretion. Union rep directive was even if we are full we don’t leave a Potentially vulnerable person at the side of the road in the middle of nowhere, as a teenage girl getting attacked after the bus left her behind is maybe worse than the low risk of covid passing about. Also wouldn’t leave someone behind on last service of day for example, never had to use my discretion but those would be things I’d consider.