Crab,
Your posit is possibly biased with Gaz experience which is only natural.
The fenestron on a 130 is near enough identical to that on the 135 albeit a mirror image wrt to direction of rotation.
The MGW of the 135 internal is about 450kg greater.
When was the last time you heard of issues on a 135 fenestron wrt to controllability?
I'm calling -