I'd be happier than the status quo even if it just meant presented to customers as a single brand — I always found it ludicrous trying to get to, say, Gatwick from London Bridge & thinking "There's a Thames Link train leaving at 5 past, I'll go for that but if I don't reach the platform on-time, I won't be allowed use my ticket on the next train, because that's South Eastern, so I'll have to wait for the train after that". Unnecessarily confusing.

"Flexible season tickets" is also a really welcome one, especially if people go to WFH/office hybrid set-up.