Desktop UI review

No doubt there are a number of good thoughts and remarks in the OP. I do however doubt that presenting them in a long text like this will help getting any of them addressed, resolved or adopted. The workload of the devs - assuming they agreed with your ideas - would be very high.
Instead chances are that breaking down this text into many palatable points, in diffrent threads or feature requests would help them being considered.
Just my 2cts.