I love it
The rear has definitely been improved a lot compared to the pre-LCI, even though I still believe BMW should lower the roofline and rear to be more appealing to others.
The interior is gorgeous, always loved the GT's interior (and roominess), it can't be matched by the F10 in any way when it comes to space, especially in the rear. That color is beautiful too, I think I will go with Mocha on my next one.
The M-Sport looks aggressive
but you need to mod that beauty in order to really bring out the GT's true potential. Start with black grilles, then drop it on H&R's (or maybe Hamann's, but I believe they're the same), and get some 20"s or 21"s (the ride would still be comfortable due to more rubber than the F10). Oh, and Jb4 gives a nice power bump btw.
Enjoy your new GT, and feel free to leave questions for me, you resident GT modder