I understand your point and the distinction between the two.
But the point I make without being an alarmist is that Ebola is a very bad communicator of virus because it kills its host too fast thereby limiting its spread.
But, it is a virus job to replicate itself and it has several methods to do that. One of them (the most dangerous) is re-assortment where it exchanges its genetic material with whatever virus are in the host body.
So an influenza may get more like Ebola or God forbid an Ebola may get more like influenza in which case we are screwed, blued and tatooed.
Ebola will have a difficult time reassorting itself. Unlike influenza, which has 8 gene cassettes that reassort quite readily between different influenza viruses, all 8 Ebola genes are on a single chromosome. It is also a negative strand RNA virus, so the mechanisms of recombination won't work very well either. Because RNA polymerases are very error-prone, Ebola does mutate fairly easily, but that is a slower mechanism of genetic alteration than recombination or reassortment.