Some thoughts on Kostin:
Has all the tools to be a very good bottom 6 winger but has struggled to put it together consistently and has been passed by a couple guys on the Blues depth chart. He is a left shooting winger...KLIM KOSTIN IS NOT A CENTER.
Has good top end speed but not great agility. Gets his shot of quickly and can surprise goalies but not a sniper by any means. Hits a lot and can be physical on the forecheck but doesn't seem to cause a lot of turnovers leading to possesion in the ozone or protect the puck well enough. Will occasionally drop the gloves and when he does drop them Kostin is a very good fighter. His hockey IQ and consistent motor/drive have been questioned by many.
Kostin needed a change of scenery badly, hope he does well for you guys in Edmonton. I think he can be a decent bottom 6 wing option, but he is quickly running out of NHL chances.
All in all, seems like a good trade for both sides.