I'm saying it in this thread but Kotka shouldn't be in the preseason, he should be in Finland getting ready for his season if Liiga is the way to go.
You don't want him to miss the start of the season.
I agree. Obviously, his dad being his coach and playing in a familiar environment while getting bigger minutes is way better than playing in meaningless games where his ice-time may be restricted. Also, as he'll only jut turn 18, he'll probably be better off emotionally and have the year to mentally prepare himself now that he knows what team he's playing for in North America.