I've considered the 2015 MBP but decided against it. The old MBP cannot drive the LG 5K screen I ordered alongside the MBP to replace my ageing iMac 27. I also like the improved screen, and for future-proofing the improved graphics and the 4 USB-C ports, so I went for the 2016 MBP. Apart from the price I see few disadvantages to the 2016 MBP for my use case, the battery life might be slightly lower but I don't travel a lot, so it's not a big deal. Besides, so far battery life has been just fine for me, at 8+ hours at light load and normal brightness.