The arguement about placing too much faith in a system as a reason not to have an advancement is a frustrating one, and one that has continually thwarted the adoption of NVG in the UK and Aus. Lets penalise those who would use it properly to protect those who would abuse every system (including what they are doing now). Makes sense.
How about the perfect system?
EGPWS with updatable database. Rad alt hold auto feature (as detailed in my last post) with step down ability. Radar that generates image and data into EGPWS for processing and warning. SOPS to keep your bloody eyes outside and on Rad alt when low level in crap viz.
And for HC we can add a mandatory requirement for sea vessels within 100nm of HLSs to carry a mode 3C transponder and ADS-B that displays traffic onto the EGPWS, a bitchin Betty that is adjustable to the rad alt bug, FLIR/EVS image and NVG image mixed and melded onto a single flat screen pannel view for looking through the gloop day or night, a database that automatically updates from multiple sources, including for moving vessels picked up from radars that would be required to be situated at each HLS and beamed back into aircraft at top of descent, and of course Full CAT A. That about cover it?
Until then, lets avoid any further advance.