Rather just have Watson. Cheaper deal, 1 year vs two, and he's a good mentor for Kastelic and Kelly, who are the guys who will fill that role once he's gone.

Likely I am saying no if I am the Sens. The only way I make this trade is if Formenton doesn't come back.
Fogele could take his spot on the third line with Pinto and Joseph.

However to have him as a 4th liner then no, Watson only has one year at 1.5 where fogele is 2 more at 2.7.
The Sens have Parker Kelley and Matt Kastlic on ELC's that can play the same role as Watson & Fogele and be 2/3rds of a great 4th line easily.