I can understand why Logos did not think it necessary to include the NT Scripture indices in A. T. Robertson and Blass-Debrunner-Funk, because you can do a search for them when you're working in Logos. But this was before mobile Logos was put into operation. And their omission seriously limits the usefulness of these resources in the iPhone/iPad apps and via Biblia.com, because no linked Scripture index is available for them.
Maybe there is another way to find a Scriptural reference or all Scriptural references in these resources when working from the app or Biblia.com that I'm not aware of. But if there is not, then I think Logos needs to add these indices - which are in the hardbound editions - to these resources.
I suspect the Logos edition of Wallace's Grammar also omits the NT Scripture references index.