After what seems like a lifetime, but in reality is just over 3 months, all public facing systems are now back online after the cyber security incident. There are likely to be some delays while the backlog of refund requests is worked through.
Oyster journey history has been kept live to enable refunds to be processed, but if the journey is outside the normal 8 weeks you will need to contact the helpdesk and get them to resolve it.
As far as i can tell, no changes were made to the fares system in September. At this stage it seems likely that the next revision will be the annual one in March. Once I can find out the scope for this, I will report.