If you guys haven't figured it out yet this place has been left for dead. Jeremy no longer maintains or cares for this forum anymore. We are alone here.
Maybe a little bit. Whoever wins the backup job is a slight upgrade from Dalton. King will need to prove he's worth a roster spot going forward but I doubt he's a threat to anyone on the roster this season.
Both are safe this season. Dan loves them both and both contributed heavily on special teams. Unless someone beats them out in practice they are secure.
I think international players do not count against the 90 man limit. The Panthers have had several over the years. They will however count as part of the 53 if kept after final cuts.