Haven't read the interviews but I can see why Soshnikov would perceive the locker room as tense. He joined the Blues while they were in a huge slump and I'm sure there were some fingers being pointed. Add to that, a popular locker room leader in Stastny gets dealt a couple weeks later, and yeah it seems pretty plausible that the Blues room was not in the greatest state of mind. I don't have any concerns with the locker room going forward, it was just a whirlwind of events that likely left the Blues in a bit of internal disarray.
Regarding Soshnikov and the rumors of him heading to the KHL, I hope that isn't true. He's not a pivotal cog on this team, but I like the skill set that he brings. He's got speed, a wicked shot, and an endless motor. His injuries are my biggest gripe about him but a couple changes in his reckless playstyle could probably reduce the amount of time he's on the IR. I'm not losing sleep if he goes to the KHL since we only gave up a 4th, but I would definitely be disappointed.