Ideally, they want to get a waiver exempt goalie via trade, even if that means giving up a late draft pick or a C prospect. It would give them more flexibility.
If they have no other options, claiming Primeau might not be a bad move just in general (with no actual knowledge of goalie technique). It gives them a bit more depth with another goalie who has been in the NHL before, who is coming off an awful stint with another team and would have a lot to gain by coming in and playing remotely decent.