This is not good.

why is this not good?

Downgraded @ Forward, for a marginal improvement on D-- While giving up a 1st round pick, and completely disregarding the cap implications for future seasons.
Oleksiak is a solid player, but it's a contract that won't get better with age.

IMO, this team is no better, just plays slightly different-- but also has a harder time getting under the cap next season, and loses a draft pick.