The best thing you can post here is going to be a datalog. There are several site experienced site members that can review how your car is running and offer input.
Leaving it alone will run max allowed boost. Any limits lower than what is specified in the calibration will reduce boost as necessary to prevent it from exceeding the new limitations. Long story short.. if you are spinning your tires and you don't want to, check and see at what point it is...
One could likely argue that if I had a bias it would be for the small brake kit I mentioned, not against it. I was told by the company owner in a private conversation that it was not suitable for street use, simple as that. Regardless, if this conversation needs to be continued it should be done...
Nope.
Standard 1.5T OEM fitment. Version 2 is just manufactured a different way, they’ve refined the process so they can build them more quickly. No change in exhaust flow when you compare version 2 and the original.