This misses the main benefit of HS2 which is making the network as a whole more efficient by eliminating bottlenecks. When people say ‘we should improve regional rail services’, they ignore that HS2 is what that looks like. And, frankly, if HS2 doesn’t reach Euston, it’s nearly cancelled for many Londoners due to the inconvenience.
https://www.londonreconnections.com/2023/hs2-a-high-speed-be...