If the UK wants to drift towards a form of semi-federalism, then it will need a more formal set of mechanisms to coordinate overlapping centres of local, regional, devolved nation and UK centres of power. It isn't just Germany, any such system from Canada, India to the US has coordinating mechanisms

The kind of quasi-informal ad-hoc flailing you have in how these relations between levels of government you see unfolding in the UK now are just a recipe for further confusion and chaos

Agreed.