It makes sense if we’re planning to keep Serg on the right and we’re giving up on Koekkoek. As far as non-NHL prospects go we’ve got Cernak and Foote on the right and only Masin with any real promise on the left. But if we’re planning to move Serg back to the left and/or we’re going to give Koekkoek a real shot then we definitely don’t need another lefty. Besides if we’re trading TJ I’d rather bring back somebody with at least some NHL experience for more of an immediate contribution and to minimize the likelihood of acquiring a bust for one of our top forwards.
I think the Serg move came out of necessity. We always tend to revert back to R/L, which, IMO, is coming more from Yzerman than Cooper, but they're both students of Mike Babcock in their own way.
I'd be surprised if we start the year with Serg on the right, unless we find ourselves stuck for a righty again.
I don't like the idea of moving Johnson for a prospect either, but I do think Yzerman would put the cap-space to good use.