Zero chance of this trade happening. Mostly, the buyout cost for Campbell’s contract is way more palatable than giving up two 1st round picks.

I disagree.
Removing Campbell's $5 million cap hit completely will be critical in freeing up even more cap space to re-sign Connor and Leon when they need their new deals, and would absolutely be worth two 1st rd picks that are likely to be in the 20-32 range for both.

Two firsts is a bit extreme... if Edmonton said "hey I'm offering to move out my first round pick to move out this guy who has 3 years left"... some teams might call him and ask for a little extra and then take it on. Since the cap is going up a little, it won't be as extreme to try to move out bad contracts as it was the last two years.