Yes, and other apps that most people don't use and that's the rub, the apps they need on a mobile machine may be ill suited on the MBP.
I can't fully define it, because I'm not in their shoes but I will say for me, and I think I'm a professional, because I use my computers for work.
1. keyboard - its awful and I hate it.
2. USB-C (yes a temporary issue), I now will need dongles.
3. Lack of magsafe. Sorry but this is a major issue, especially when you're working in a hotel, conference or other location with foot traffic. Tripping over a cord is a major headache and magsafe was a great solution.
4. Lack of SD slot. Yes, I can buy yet another adapter but its exclusion is yet another knock on the it just works mantra because it doesn't just work out of the box
5. Value - what am I getting for the price - the new MBPs have less ports that I need, less battery but a higher price. I will be required to buy dongles and cables that I currently don't need. The risk of forgetting/losing them is high and its just more crap that I have to be sure to pack when I travel. Gone are the days of just throwing the computer into my backpack and heading to the airport.
On a non-personal front, i've seen enough people wanting more then 16GB of ram on a mobile machine and Apple's decision to cap the ram at 16GB is a real issue. I understand the move, because of battery, low power mode, etc, but that still doesn't help those people who use laptops and need more then 16GB of ram.
Have you tried the butterfly 2.0 keyboard? I am a web developer so spend all day coding, i'm really worried about the keyboard and will be the main decider on whether I return it or not.
Man I wish the Surface Book was 15"