Coleman is what, 3 years older though? Coleman's team friendly contract certainly provides added value for next season, and he's got an extra dimension that Tierney lacks for sure, but RFA vs soon to be UFA, 3 years younger, I think Coleman is playing wing vs Tierney playing center (Tierney had more faceoff wins last season than Coleman has in his entire career). There are definitely factors that go in Tierney's favour as well.
I also think Tierney is significantly more highly valued around the league than his is by Sens fans, but that's just me...
The big think in Coleman's favour is he neatly fits into a 3rd line role, while Tierney seems like a square peg in a round hole no matter where you place him in the top 9.
I don't think age plays a big factor in those kind of trades. We are talking about players who will probably be short term acquisitions, and if extended Tierney is only going to get 3-4 years in term.
The Tampa trade is clear as day. They probably liked they player and know they can have him in their top 6 as a complimentary guy or their top 9 for 1.8 million. They paid big assets for a cheap cost controlled player. Tierney is not that cheap and is not cost controlled.
Tierney is more difficult to swing a trade like that because the team will have no idea what he will cost next season.
I agree now might be the best time to trade Tierney. Unless he has a breakout season next year, he will get us more this deadline. I don't think he will get us anywhere near what Coleman got New Jersey because the situations are completely different. Centers of Tierney's caliber who aren't rentals usually go for a 2nd+3rd or 2nd+2nd.
That Vancouver pick is huge. It has potential to be in the top 20 of the draft. There is a slight chance it could end up in the top 15 if Vancouver goes on a skid and misses the playoffs. We'll get nowhere near that kind of piece for Tierney, and cap strapped teams might think twice about acquiring him because if they qualify him in the summer they will have no control over what he makes due to arbitration. Coleman didn't have those hurdles, he was completely cost controlled. If Coleman was an arbitration eligible RFA, he wouldn't have returned anywhere close to what he did from Tampa.