We've been patient far too long to just trade Allison when he finally is back to healthy. And if we did, it would probably be for prospects and picks, not for current NHL talent because a trade of Allison would likely be the first step in a youth movement which this team is poised to do this offseason.
Besides, when both players are at full strength, Allison puts up better numbers and is more physical. The only aspect that Koivu is better than Allison at is that his contract ($4.25M/year) is half the size of Allison's ($8M/year).
Our system is stocked full of 5th-7th d-men. With Kuznetsov back in the country and playing, I think our need for another d-man has been taken care of unless there is an offensive d-man on the market.
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Saxon Sports Information and Research