Excellent post careful. Yes their abandonment of Franz's "types" may be causing unintended problems. And they are not as creative or intelligent as Franz was.
Yes Russell had a lot more to say about the gap between the second century apostasy and the nineteenth century revival. I think the Bible Students identified the messengers of the church in Revelation as: Paul, Arius, Waldo, Wycliffe, Luther and Russell. I can't find the source for that now, but in searching for it I came across this interesting discussion of Russell's "church thought".