Agree - the whole point in buying the 15" Surface Book, and paying a huge 3k premium, is for the Graphics card and high spec, in order to use Apps like Premier Pro and Lightroom.
Lightroom still crashes whenever I enter into anything mildly NVIDIA GPU related. To workaround this I've had to switch off "Use Graphics Processor" in Lightroom (Edit, Preferences). Although for me this defeats the whole purpose in me purchasing the 15" Surface Book.
It's been way over 4 months and still no resolution. I still suspect the issue could be hardware/power related, and if so I can't see a fix coming. The only positive is that I'm able to play Xbox Games Pass games fine - even high intensive stuff like Forza 4 works ok. That gives me hope that its worth holding out for a fix before I swap the device for something else. Some new good stuff on the market now from other manufactures with equally high spec - and none on this "one graphics card in the screen, one in the keyboard section" business.