you always keep a very good look-out, do you not?
The evidence seems fairly firm that even with the best feasible unassisted lookout, pilots don't see a high proportion of conflicting traffic. The rarity of collisions in class G airspace is therefore more down to the bigness of the sky and the sparsity of traffic in it. So if you make the sky small and the traffic dense, looking out of the window may give a very false sense of reassurance. This is particularly the case at the low levels available around Farnborough, where people aren't going to be following quadrantal or semicircular rules.
The consultation document doesn't seem to realise this, citing making GA follow more predictable routes as a positive thing. It may be of benefit to them, but it certainly isn't of benefit to GA.