Update on the BMC. I've had the bike for about 1.5 years now and gotten in a few thousand miles. I upgraded the wheels to Roval Alpinist and the bike was literally transformed! Absolutely love the ride. I think my feeling of the slow steering was related to the long stem. I've not had a bike with a stem as long as on the BMC, but I've learned to adapt to it and no longer have any issues with the steering (it feels more precise). I still don't like the Di2 when it's cold and I'm wearing thick gloves, but otherwise I have come to really enjoy electronic shifting. Overall, I'm very happy with the bike.