The value Kubalik had was being a big skilled forward who was potentially able to play on the 2nd line and PP, and compliment smaller less physical players while still being a skilled passer and goal scorer.
While the Jackets have guys who can plant themselves in front of the crease, odds are if they do get the puck it goes some place other than the back of the net or they miss the opportunity altogether. Kubalik had the knack for actually being able to score, which still is sorely missed.
But he's regressed and if whatever's the issue, he's not going to live up to his potential in the Jackets' organization, then it's time to trade him.
If he's disgruntled, then maybe Jarmo did the best he could, but the Jackets need skill, not more grinders.
I do wonder if Machacek is going to be happy with the trade, especially if he feels he's NHL ready and there may not be the opportunities in Columbus since there's so many other players ahead of him. Maybe he gets the call-up before Sean Collins, but he's likely stuck in Springfield.