If I may offer an idea based on a modest experience in NATO: the UK returning to a maritime centered strategy, and looking well beyond Europe, makes some sense if we look at broad/large muscle movements.
There are numerous nations in Europe who can cover the ground fight in Europe proper if need be.
I think Mr Hastings is slightly guilty of Cold War era thinking in his criticisms.
Beyond that, not my rice bowl to worry about ... beyond keeping an eye on AUKUS and other Pacific Rim mutual security structures.
(Which means, yeah, I am being a bit selfish in my outlook in viewing the UK's strategic tilt toward the Pacific favorably; not an objective observer).