Regarding the 100 call (and there is no "feet" in it), it's not obvious to me why it was not heard. The 100' call inhibit of AVAD is with ROD more than 5000'/min, not sure if that's carried over to v26 but surely not relevant here. It's worrying!
Followers of my earlier spats with NL will be aware that I was not a fan of EGPWS, but I did think that v26 (unlike v24) was an adequate substitute for AVAD. Hopefuly AAIB will provide the answer.
HC