Kastelic mentioned that Sabourin took him under his wing and really helped him develop as a pro. I could see Sabourin being valued by the organization as a mentor to the young players, to keep them safe and help teach them how to be more physically imposing and consistently physical. He could be a good fit in that role, I just don't think he is a great fit as a heavy in Ottawa if they need one.
Lucchini had a solid season last year, can provide some scoring and plays with an edge. Good veteran addition.
Don't know much about Rubins but it seems like he is a solid depth defensive d man.