Interesting point, but in these days of MCC and CRM, aren't we duplicating the cross checks and messing up your routine with the various extra checks, thereby adding to the workload?
Personally, I always found SRA's much easier to fly than pilot interpreted aids. You just do exactly as you're told, don't even have to reply during a half-miler and just look out of the window at MDA!
2 sheds
The aerial site was chosen before my time, but I think the south side marker would end up about 50m from the head, if it were sited at touchdown....theoretically though, I suppose they'd still be detectable given the short pulse length....might toast my Tels man tomorrow by way of an experiment!