The TBM code and systems are extremely complex. Many things have been done that have never been done before in X-Plane. There are systems inside the TBM working outside of the sim, in their own environment. So in saying that, it is impossible to compare it to freeware add ons and most, if not all payware.
As far as the driver issue, it's not my opinion...it's a fact. The GPU driver is crashing. The log file is telling us this. It is very likely, to the point of it being a certainty, something in the TBM code and the multi monitor setup is causing this, but we don't know if it's ONLY this or a combination of something in Laminar AND the TBM and the multi monitor setup, or Laminar, the TBM and the shaders being used for the rain and ice, or all the above PLUS the type of GPU. Add to this the plethora of system configurations in the PC's of our customers, and you're looking at too many variables to isolate it in a short time frame. Which is why we always need log files.
We're still investigating, so for the time being, when it comes to a crash involving the GPU, we're advising everyone to avoid running the TBM on more than 2 screens. In the vast majority of cases, this temporarily solves the problem.
As far as a rollback, that's not possible. I've told everyone, via these forums, over the last few months, to PLEASE make a backup of the TBM and/or X-Plane just in case something goes wrong. I don't know how X-Aviation handles the rollback process, and why they don't have one, so you are more than welcome to send in an email and ask.