Card management this season really isn't a huge concern, and shouldn't be. For future seasons, perhaps yes, but for this year, the team didn't and doesn't require major additions to compete in the playoffs.
Those players they added are good solid additions and I believe they'll fit in well with who we have as the future core. Remember just where we are in terms of building a serious contender. It was only last season and during the off season that most of these younger players were added. Next season was the target year, with this one being merely a dress rehearsal. The unexpected additions of Bouchard, Boqvist & Formenton changed the trajectory to a more upward possibility, and this season begins to look like a possible year of contention.
This season is a bonus one, where those younger core group will gain the experience needed to grow into championship contenders.
Perhaps that card limit will prove to be just enough for where we are. Too many changes can also have a negative impact, and the plan goes off course. Just my opinion, for whatever it's worth.