This will mean that the lovely Newcastle "expresses" (which I note XC states will not be restored until September at the earliest

) will no longer be "expresses".
Just like the current Manchester services, they will no doubt be crowded full of one-stop passengers along the Coventry-Birmingham corridor. Just what is needed!
Coventry-Birmingham needs to be four-tracked (or at the very least a couple of the station-to-station stretches should be) so that an intensive local service can be operated without jamming full long-distance services with local passengers.
All this talk of passengers from Newcastle going to Birmingham Airport because there's a once hourly train that trundles along there in the same time it takes to get to London - utter guff.
Before Covid it had a handful of expensive flights to European business destinations (most of which are better served by Edinburgh, Leeds, Doncaster or Newcastle), along with typical Costa del Sol type cheapo holiday destinations. I very much doubt it's ever going to serve more than that after Covid.