I think Clarke MacArthur knows that he has found a great spot for himself playing with Grabbo and Kulemin. Even if they cannot sign a contract now, he is a RFA and I think that is the way to go. Go to arbitration, accept the one year deal, and see if Clarkey Mark can put up numbers again.
On Weiss, he plays all the tough minutes in Florida. On a team with our top two lines, he would probably see less competition since the Grabbo line seems to attract the most attention. If you think Weiss would be a good fit with Kessel, then you pick up Weiss.