I'm expecting, eventually, not immediately, an increase in patronage of the Central Line north of Stratford by people in places like Hainault and Epping using it to access the Elizabeth Line. Similarly, at the other end, will any residents of Ruislip abandon the Metropolitan Line for the Central Line?
It will be interesting to see if fewer people change at Tottenham Hale and Seven Sisters for the Victoria Line, changing instead at Liverpool Street for the Elizabeth.
In my neck of the woods, there should be decreased pressure on the Jubilee line which will be nice. Before covid the crowing levels between Canada Water and Canary Wharf were getting pretty bad, and Canada Water was being regularly overwhelmed. It's approaching those levels again now. I think enough passengers might switch to changing Whitechapel that Canada Water will get a a good number of extra years before it needs a radical capacity enhancement. There should also be some effect on London Bridge and Cannon Street as many from the South East who take trains into central London only to head back out to Canary Wharf will now be able to change at Abbey Wood. Passenger numbers at Cannon Street may drop quite significantly.
So are the Crossrail platforms at Abbey Wood fully accessible then (from street to train) even though the Southeastern ones aren't?
Platforms are accessible but the trains don't have level boarding.