The XC to Hull seems very wasteful - avoiding Sheffield (??), Leeds and York; Doncaster much reduced in importance post-HS2, and an hourly London service between Hull and Doncaster as well, on top of Northern's offering.
If this diversion of XC from somewhere with HS2 service to Birmingham was at the other end of the M62, there would be much rejoicing. XC to Hull wouldn't be questioned if it was an Operation Princess removal.
It's quite a sensible move to not duplicate what HS2 will do faster, and Hull is somewhere that could be less on a limb from the long-distance network.
However avoiding Sheffield though is very strange - presumably capacity issues, given the increase of London service by one, and the replacement Sheffield-Doncaster-York service, but not wanting to have to add a Sheffield station upgrade to the HS2 costs total*. Avoiding Leeds is what the service already does. And I agree that Doncaster-Hull being 3tph fast (albeit on different routes) seems overkill. But this is only a model, and the real-world proposals 10 years from now (as this is phase 2b) will have to look at that.
*cf the Reading resignalling/rebuild and the Crossrail project officially terminating at Maidenhead to keep that billion pound scheme from adding to the already large price tag.
The whole document is completely out of date though, because demand on all routes has evaporated.
But anything updated to account for COVID fearfulness could be wrong - there's arguably too much uncertainty right now to predict the long-term effects of COVID.
Interesting. Apparently the whole need for the HS2 tunnel under Manchester is because of congestion, however it proposes extending 2 London Midland services to Manchester (in addition to the HS2 Birmingham services it has). So are the lines congested or not?
The (new, rather than extension) via Stoke one is adding frequency to the local Manchester-Stoke service (which would otherwise drop frequency due to this change: "the hourly Stoke-Manchester Piccadilly and
Macclesfield-Blackpool North services are combined") as well as continuing to provide 2tph London-Stoke, and the hourly Milton Keynes-Manchester direct service. It replaces 2tph Avanti between Stockport and Euston with just 1tph.
The (extended Crewe services) via Warrington one is a bit odd - presumably its about Trent Valley - Manchester services and improving Crewe-Warrington service.
Meanwhile, both London Midland (as it was) and the Liverpool authorities have been angling to get an additional service extended from Crewe for many years, only for it to be refused by the government's rail regulator. Apparently congestion there doesn't figure, as to any HS2 need.
Along with the city now needing the fudge of a joining of services at Crewe just to stand still on London services, it still remains disconnected from Birmingham via HS2.
Indeed, which is why a spur of the 21st century network into Liverpool is really important and should be prioritised to open as soon as practical - it's almost certainly going to be considered part of NPR rather than HS2, but that's due to the 'Crossrail terminate at Maidenhead' issue more than anything.
But the shape of HS2, such the lack of a captive Liverpool branch, is off-topic and for another thread.