You do not make it easy to respond but write in such a way that it deserves responses.

Workers could choose the most competent managers but I do not see much evidence that democracy gives us the most competent.
I also would say that ownership will influence management and question why a worker would know who would be the best manager - does a footballer know the qualities to make the best football coach?
I think a Capitalist world might accept alternatives that did not promise to threaten them. In fact if the "communal" system showed advantages it might be embraced - what tends to put hackles up is aggressive ideological rhetoric - a quiet "friendly" revolution might be very welcome if it solved some of the problems we all see around us.
I can see that there are enterprises that would thrive on a local scale but there are many others.
I cannot see how your model could produce the modern goods and services that people want. You might think we don't but having lived in a small local rural community and seen the sons and daughters of the locals hanker after a "better" life I know that the rural ideal has a limited appeal. Our local farmers knew they could not pass their farms on to their family as they just were not interested.
In short I can see your model being appropriate in a small and limited way - but for society at large I doubt it.
In am not sure how big this model can become Arthur. The biggest concentration of Workers Cooperatives is in Spain. Discounting the Basque territory and Catalonia, where the concentration is higher, there are 18,000 in the rest of Spain, employing 300,000 people. This network has its centre in the organisation Coceta. The Basque coop confederation represents over 800 cooperatives and the Catalan equivalent 'Confederacio de Cooperatives de Catalunya' has over 5,000. In Catalonia they are mostly small, employing an average of 7 staff but are operating in many sectors - services, construction, industry and agriculture. In Catalonia there are listed as being 40 schools which operate on this basis. This model could easily be repeated in countries like Portugal, Italy or Greece where trust in the neo liberal model has collapsed. In the last quarter of last year cooperatives created 19,000 new jobs in Spain - not many for such a large country but impressive when the rest of the country is not doing so well. There is nothing to stop the Spanish network being able to cooperate with a similar network in France or Italy.
I admit that Spain has had a tradition of 'social economy' for quite some time, which makes it easier there. Check out on the village of Marinaleda in Andalusia - found under Communist villages in Spain. Many others in the south will follow when they realize their life savings have gone - and mutual self help is the order of the day. Cooperation between such groups is the globalization which I want to see. The mantra 'Globalization is inevitable' does not have to be swallowed up in its entirety. What we have seen is a globalization of finances - my capital can fly like a bird (I would restrict this by the way) - but not a globalization of wealth, which appears to be concentrating itself. We do not even have a globalization of technology when only 5% of the World's population have ever used the internet. And of people ? We appear to be building walls everywhere, and labelling whole groups of people as undesirable. So where is this globalization ?
I think that is one of the problems with your concept. It might work on a small scale for people who want a simple life but I suspect it is a tiny minority. It does not in itself make the model invalid but makes it rather marginal.
For people unlike you that do not really have a problem with hierarchies and can understand that a boss can be a "work superior" but is not superior in any other meaningful way then that is not a driving force. Most of the people I know have worked for other people quite happily.
I also think most people - especially young people want something to look forward to in life. At my age I might be quite happy in a small rural community but I know none of my children or grandchildren aspire to that.
To build a society for the future I would look for one that embraces size, global perspective and industrialisation using modern technologies. The trick then is how to have this whilst respecting both other people and the environment too.
I think that I stated in my last post that the idea of the Worker's Cooperative is not confined either to agriculture, or to a rural way of life. Any branch of the economy can be governed in this way. Also important is that those enterprises which do work along these lines form a network - like a 'community' in itself, although geographically dispersed. My acceptance of the worker's cooperative idea is,in itself, a compromise - I prefer the idea of communal ownership, because worker ownership is still a form of private ownership, though collectivized. Modern technologies are just as easily incorporated into the coop idea as any others.
You are probably right in saying that my ideas are not cut out for the British working population - unless conditions arise such as in Southern Europe. The English are mostly content to be ruled, and then to grumble about the quality of that rule. Which is what we see now with Brexit. It was not the fault of Farage, Bojo, Cameron, the Tories or Ukip, or even of the media - it was the fault of the17 million people who voted for it, and also those who stayed at home. In the end you get the government you deserve. The average Englishman is not identified with his profession, or his firm - and is mostly happy to drop the role the minute work ends in the evening. People have told me that in Japan even the cleaning lady knows the finances of the firm where she is working. So these ideas of mine need a cultural and a social context around them. By the way, they wouldn't work in Germany either. But there is nothing idealist about a town, or region, having a development plan which fully utilizes local talents, and raises their resilience against global crisis's. At any rate they should be accepting that Co2 emissions are their responsibility, rather than waiting for national or global solutions. You can think globally, but you can only act locally.