Your "Elms and Critical Mass" document is a very pertinent piece, but will be ignored by farming and Govt/DEFRA. More fool farming...
I was thing along the same line last week with rteference to your first para. on critical mass. It is something many of us have or will experience sooner than we like.
It has been read by the top policy people at NFU and by the people writing ELMS, all we need is for the former to demand it of the latter and the jobs a good'un.
I have had feedback from Defra suggesting that such a weighted system would be difficult to implement. If that is the only argument against it then I am confident that a way can be found, as compared to much of what is in the SFI it would be simplicity itself.