For what it's worth I saw him after the scrimmage signing autographs and taking pictures with kids for a long time. Didn't see any ill affects. I'm sure it was precautionary more than anything. Seems like a real good kid.
It seemed like it was an LBI back when it happened, so signing things shouldn't be an issue. I have no issue with them holding guys off the ice rather than potentially aggravating injuries is fine for me.