It seems to me that EFATO is the most dangerous situation for any aircraft, particularly a single. For this reason, maximizing the TODA for singles must be the objective, so that in the event of engine failure, there is the maximum amount of airport ahead (either to brake or land back on), or the greatest possibility of reaching a safer altitude (for alighting clear) before crossing the airport boundary. This seems to be what Exeter have in mind - no D1 departures. Perhaps (if possible) re-instating the northeastern taxiway or building a SE taxiway would eliminate the holding and backtracking problems - certainly cheaper than buying properties in the PSZ.
On approach, should the emphasis not be on flying circuits commensurate with being able to glide in if the donk quits (far less likely anyway than at T/O) rather than on fecking around with perfectly serviceable tarmac and noise abatement procedures (aka safety abatement procedures).
White Waltham is one place where I know there are a lot of houses below the final approach to one of the runways (I can't remember which - FFF?). Does this mean that WW needs a PSZ, as there are a large number of single-engined aircraft movements? I'm sure there are several other GA fields that are in a similar position.
SD