I think they should just do a 1:1:1 distribution of hard clay and grass and do the YECs on indoor carpet to shut all the agenda driven people up.
While the whole thing will shut some people up (it will IMO make a lot more a lot more vocal, most notably the Vamosalaplayans, who see as an eternal right for their idol to have conditions that suit his game), the representation of the surfaces has never been driven by mathematical formulae.
The game has its own natural development, and that is disrupted only when reasonable or not so reasonable suggestions are made to alter that natural development.
As it stands, the natural development that we see is that grass has been sidelined for cost reasons, and unless we see a strong interest because of its exclusivity, it will remain a niche surface (which is not necessarily a bad thing). Judging by the attendance that I have seen in Stuttgart, Halle, Queen's and Wimbledon, the surface enjoys a lot of interest, so there is a small but pretty hardcore following.
Carpet is another possibility, but it needs to be reintroduced on a consistent basis and allowed to be played on at smaller and not money driven events like DC for example. Also, not only the WTF, but also most/all indoor events should be able to have it, if they so wish.
There is a lot to be said about the speed of the clay and HC as well, but the natural lashback to the gruelling HC rallies is already there, so I am hopeful that we will have fast HCs again.
Another natural development, based on a weird occurrence (the blue clay) was stopped, but I am also hopeful that this will continue and many TD will choose not only to change the colour of their clay courts, but also their speed and feel (Har-tru returns?).
