Agile raises a good point.....were the drive shaft come adrift and start flailing about it does seem likely the flight control linkage could get Involved.
If you recall, a 139 had a similar problem (electrical and not mechanical as a cause) where an electrical fire compromised the Collective Linkage and caused a very serious flight control problem.
There are only so many ways to separate critical components and at times unintended consequences arise that remind us of that.
What Agile points out bears consideration.