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.
Cannot judge a draft class until 3 seasons have gone through. It takes that l9ng to determine if the first 3 rounds were worth their selection. Some may become obvious sooner bit some positions take a while longer.