Those widow makers were dead so there'd be no issue cutting them except that, for trees that size, I'd use a chain saw (which they would NOT be OK with... IF, of course, they found out).
As for priorities, I assumed that they just hadn't gotten around to it when I was there. The Frost river is not a heavily traveled area so I'm sure the sites on that route are not top priority. At the same time, I didn't report it so, if nobody else did either, we'd have to rely on a chance patrol or hope someone from the USFS reads the trip report.