I understand the exercise, but I just can't see how the team can get better value at $1.1m if you move on from him. Even if somehow he is the center piece to upgrade to Necas (for example) and Carolina for some reason accept, you are paying like at least $5.5m more this season. You can dump Poolman with a pick, carry a 21 men roster for the season, and still won't be able to fit Necas under the cap. And guess what, Necas and Hoggy scored the exact same number of goals last season, while Necas is 2 years older.
For a team as close to the cap as they are, you just aren't going to get a better "bang for bucks" than Hoglander, IMO.
As for his future pay, so much can happen this coming season, its too early to worry about it. He can either take a huge step and become a legit top 6er, and you'll feel silly dumping him early. Or he can regress, then he won't be expensive going forward and you might even move on from him. He can have a repeat season and you decide next summer what to do, I'm sure you can then send him to a rebuilding team for a pick, the Hawks and Sharks would surely take a 24 year old 20-goals scorer for a mid pick. At the end of next season, he is a RFA and we have control, so there is no need to think too far ahead.