PBL
I think you're missing my point somewhat! The main thrust of my post was to do with the philosophy of assessing the criticality of weather avoidance at all costs, as opposed to looking for the path of least resistance, and mitigating further threats to the operation.
The other point I was making with regards to TAS was purely one of increased momentum at altitude. For a given gust vector, an increase in TAS (for a given IAS/EAS)will result in a greater resultant displacement vector from the flight path. And we all (hopefully)know what that can result in...
Cheers