I look at how other European countries organise government around their capitals and just seems a lot smarter and less fragmented than us. Paris - Ile de France, Madrid - Comunidad de Madrid, Berlin - Berlin-Brandenburg etc then you look at the Dutch, less centred around Amsterdam but Randstad reflects the poly-centric but interconnected nature of that region.
I think you're slightly mistaken in your outlook here. Brandenburg is an entirely separate federal state, covering a huge rural area that at the outskirts has nothing to do with Berlin whatsoever. It is about 2.5 times larger than the I-d-F and 4 times larger than the Madrid example. Not only that, Potsdam is in Brandenburg, yet is umbilically connected to Berlin, so in your thinking should actually be part of an expanded Berlin. The fact that the two states work together to fund/form one Verkehrsverbund (VBB) is separate to their statehoods.
We had something similar in the Hamburg region - the Verkehrsverbund covering Hamburg and its outskirts (HVV) was split between Hamburg and two other federal states. There was a combined tariff validity with the rest of Schleswig-Holstein (which was largely not in a Verbund area, except Kiel, but operated a common SH-Tarif), but not, as far as I understand, with Niedersachsen. If there was, then S-H residents could use the SH-Tarif for journeys the the Lower Saxon part of HVV but no further, and likewise in the other direction Lower Saxony residents could use Niedersachsen-Tarif for the S-H parts of HVV, but no further).
The local government boundaries do not "need" to move; TfL and the surrounding local authorities need to get better at talking to each other. (It does seem, from other threads, that TfL tends to go in with a mindset not that dissimilar to the 45th and 47th president of the US when opening negotiations...)
Incidentally, I hope you've filled out your response to the Hertfordshire Enhanced Partnership Survey...
including the abolition of the existing Medway unitary which covers a logical area.
Oh no, if only it did! Medway was unified on the basis of the former Rochester-upon-Medway and Gillingham Borough Councils, which were themselves formed from Rural and Urban District Councils, which came from parishes.
@aron2smith would hate to see the southern boundary of the Medway Council area. Parts of Lordswood are in Maidstone, parts of Walderslade are in Tonbridge & Malling (TMBC). I used to joke my parents crossed a council boundary five times to drive to the supermarket (a single, largely straight road).
Maidstone is making this significantly worse, even before LGR was a thing, by sticking a chunk of it's housing targets right next to Medway, knowing full well that it will gain the council tax but residents will look to Medway for services.
At the same time, when the Medway option for LGR was revealed, which suggested ironing out these boundaries, the leader of TMBC reacted as though Medway had suggested a hostile takeover involving the TMNBC leadership being dismembered and burned at the stake. The same council who own a car park in Walderslade that never got gritted, and when people phoned to complain they denied they owned one there until they were told "it's got your sign on it, and you seem able to empty the money machine"!
Kent and Surrey, for example, could have got together and had a single mayor, but decided not to do so.
Good! The idea that a "Metro Mayor" could be covering areas as far apart (in both distance and interests) as Haslemere and Margate was, and is, bonkers.