You're where I am and I've had this Intel MBP for nearly 4 years and haven't been nice to it (compiling, etc).

    Percentage Used:                    3%
    Data Units Read:                    57,377,073 [29.3 TB]
    Data Units Written:                 77,652,525 [39.7 TB]
    Host Read Commands:                 1,297,472,434
    Host Write Commands:                1,855,797,459

I have 10x your host r/w commands. I wonder if the size of the SSD's blocks on these new MBP are very large so you get large physical writes for small OS writes? Or maybe the controller is bad at coalescing writes?