So how do the trades help Ottawa or Carolina?

Carolina gets a starting goalie and a potential top 6 forward in a year or two. Ottawa gets a reliable 3rd line center, a cheap young 3rd liner, a well regarded prospect and a first round pick

Carolina gets a prospect who doesn’t project to better than skinner and goalie who is just a goalie because he’s so hot and cold...and has 3 more years left on his contract. Ottawa loses a a consistent scoring winger for a bad contract, a late first round pick, and two prospects. Neither is well regarded. Foley has the most upside and at best becomes backes-lite. If either team trades those guys, it will be for much more. Would you trade tank, Schwartz or schenn for a similar package?

Tank, Schwartz and Schenn are on different levels. They are bonfied top line players. Skinner and Hoffman are top 6 players. Allen is young and is a starting goalie. He may have a cold streak for a month every year but when he is on he is great. Kostin is higher regarded than you think. Berglund is not a cap dump. 3.8 million for a 3C who scores 20-25 goals a year is a good deal. Barbashev isn’t highly regarded but is cheap and can play a reliable 3rd line. And Foley as you said has the best potential.