Re , ".....quite a few were judged to be nothing to do with the characteristics of NAS 2b....."
Quite rightly put. NAS2b was designed to put hi-performance RPT jets in close proximity of VFR pilots. Anything other than a hit was just the airspace working as it was designed to do. Nothing abnormal about aircraft missing to the left after planning to pass on the right?????
Truly inspiring airspace design, Joseph Heller would be proud.