Cates is fine at 3C. Second half of last season, Frost and Cates were 2a and 2b.
So if Couts is close to 100%, a lot less pressure on Frost and Cates.
Foerster would be a good RW for Cates, good playmaker who is also physical, good fit for an "energy line" that can also contribute offensively. Question is who is a good fit for them at LW. Maybe Laughton if he isn't moved.
As a 3C, Cates wouldn't be expected to generate a lot of offense, and his defense and ability to fill multiple roles makes him valuable.