I'd be riding Smith-Malkin-Puustinen as a line until they stop working for sure, even when Rust is back.
The interesting thing with Puustinen is that I think it puts Rakell in a weird spot with the roster, where he doesn't really have a good fit on the team. If Puustinen ends up legit, I could definitely see a case to be made of trading Rakell and distributing that money to 2 good bottom-6 options.
Not only does Puustinen take Rakell's top-6 role, but he also looks like he should be locked into the PP1 left half-wall spot, which is another main spot for Rakell.