Considering defense has been the only strength on the team this year I'm not sure why you are making it worse. All the D coming is a downgrade in the zone from what is going out.
Larsson isn't getting moved, especially for that weak of an offer.
I could see the Oleksiak trade happening but I doubt RF does it for one year of a pending UFA.
RF doesn't trade 1st rounders historically and I doubt Chychrun is the player that gets him to do that.

Can't see Seattle(or any team) trading what will be around the 10th overall pick for Chychrun.

That defense would get crushed defensively.

I know Chychrun has been hot dog ass this season, and Ottawa would do well to get a pick like that for him, but I really wanna believe that there are some west coast GMs with blinders on that would give some kind of sweetener on top of that lol