Similar scenario for me. Went from a 2012 e70 with standard suspension to a 2016 F15 M-Sport with no DHP or M-Adaptive. Since the e70 stuck to the road like glue with little to no body roll and handled well, figured I should be good with the Comfort/Sport. I should have studied more. Comfort and Sport adjust steering, throttle and transmission responses - but do nothing for suspension.
The body roll in turns and off-ramps is very bad and the bounce on some pretty decent freeways is also very bad - no comparison to the e70. I am very disappointed on the sponginess of the ride. I ordered a new one today with the DHP option. In a weeks time - I will lose approximately $8K plus tax...in CA that is $6,400 - for a total loss of $14,400. I have a call into BMW USA to discuss since my test drive vehicle and area for test drive didn't exhibit the performance issues and am looking for some assistance to offset my losses.

I am taking a huge chance that it solves the issue since there isn't a single DHP or M-Adpative Suspension at any dealer within a 1,000 miles and I do not want an aftermarket option - and driving the vehicle with the way it handles is too sloppy.