As much as I love the "Star Trek Concordance" (both pro editions), I must admit that I haven't opened either edition for years now, not even to flip through as a coffee table book. Memory Alpha, in inverted commas, as an additional term in any Google search for "Star Trek" data, brings up the required information in seconds.
One of the aspects I'm coming up against, now that I've pretty much finished getting the lexicon, more or less, back into shape (pending further editing), is the synopses, and how some of them are rather off on the details, usually in the sequence of events or characterization in characters' decisions. I've already had to tweak a few back into line, and fully expect to do a bunch more. (Interestingly, the synopses from the '68 edition aren't as far off as the '76 version, probably because memories, and studio access, was a lot better in '68 than '76.)
If it fails to even mention Leonard Nimoy's final canonical appearance in the "Star Trek" phenomenon then having this new edition becomes pointless.
I'm quite sure there'll be a mention in the introduction. What there won't be are entries in the lexicon.