The Habs' development camp is the first week of July (right after the draft). It won't help to have him travel to North America, participate in the camp, as soon as that is over, travel all the way back to Europe and participate in all those camps, tournaments, and preseasons over there.
When you factor all that travel in such a short span, they will not do any service to their own prospect.
Before, the Habs used to want all of their European prospects in North America for camps. This would hinder in their development. One example was Sebastian Collberg. In his SHL team, he was slated to play a key role. But because the Habs insisted for him to come to Montreal for their camp, someone else was put in the spot Collberg was going to play. That player did so well that when Collberg finally returned to Sweden, he lost his spot and was then put in a smaller role, thus preventing him from developing as much as he would have had he remained there and not come to Habs camp.
Since then, Habs have altered their approach to their European prospects.