The Jets aren't giving DeMelo away for nothing.

Huge overpay for DeMelo. The other 2 trades would get better returns.

Please, give it up

No. They're not giving him up for nothing.

Can you please tell me who would you like to see to replace Ceci?

I don't think he should be replaced. They'd be hard pressed to find a better RD for the same money or less, and especially if the reports of Ceci dealing with a groin injury for most of the season are true.
If the Oilers decide they need to trade him though I think a defenseman on an ELC or bridge deal that's been trending up, or one that had a breakout season on a team that won't compete for a while maybe. Trading for a hope is sketchy though.
Strange things happen sometimes too, players request trades with a certain team in mind, or go on LTIR until the playoffs

I thought of Chatfield from Carolina a bit. The Canes have a history of trading sudden over performers for known experienced players with more than one year of term. Like house flippers or stock brokers but for hockey players.

This doesn't work for CHI. Yamo may get you a pick from another team

That is obviously not nothing, so quit it