I think that they were probably right about the severe logging of old growth being a big part of the problem. Just because that logging dwindled, and the spotted owl numbers are dwindling, does not mean that logging was not a big reason.
It takes decades for habitat to restore, and a mere 10 to 15 years is a drop in the bucket of time, compared to heavy logging of old growth since the 1800s.
That another owl is partly to blame is well worth studying.
But I find that these scientists get in blinders mentality that we need to see results in a short period of time. It may take 50 to 100 years to actually study this type of thing.
I suspect that scientists may need to set their sights on much bigger intervals of time to learn about this. One thing is certain, this species has not existed forever. So they must have gone from just a few to thousands at one point in history. Seems they could do it again.
I'm not aware how much old growth or second growth was in the Oregon Biscuit fire area, but the number of acres devastated by that fire were incredible.
http://en.wikipedia.org/wiki/Biscuit_Fire
A fire that intense must have quite an impact on the wildlife populations for decades.