The main problem is that Farnborough are a minor player locally in terms of movements, but want to control all the local traffic (and exclude it when it doesn't suit their own needs) to cater for a relatively small number of their clients convenience. In the process that would constrict all other VFR traffic in the area to narrow corridors, creating a serious and unacceptable collision risk.
Their proposal would place 'their' airspace at ground level halfway down the runway of another local airfield, and within the visual circuit of the busiest gliding airfield in UK (possibly the world).
All this has been pointed out in great detail. Detailed constructive discussions with them on how to accommodate their needs have taken place, and then all suggestions have been ignored in their submission.