I have 312mm on Tiguan. I am really not sure why they put on that car 288 unless saving money.The base Golfs have 288s up front and 272 out back. I swapped my fronts to 312s like the base GTIs have and running yellows up front and Motul 600 fluid seemed ok. The R brakes are where I will likely end up (340s) and can even go up a size in teh back to the GTI performance pack brakes. Issue is that they are heavy - BBKs save a lot of weight but they also are just too much money in my opinion. With the R brakes, they are known to work but ideally you should swap to the R master cylinder as well. I was able to get up to 130 on the track so slowing from that cooked my original setup.
Interestingly I have 312 on BMW, and those brakes did not blink on track. I think if you go Ferodo you might be close to solve an issue.