I've done a 180 on mine (15" 1TB 460) and after doing a week-long project on the road I'm fully in regretsville. My external monitor blinks off and sometimes doesn't come back on, my USB mouse consistently doesn't respond after sleep (despite the lights being on), the built-in display flickers, and if I don't open the lid before I undock the external monitor it sometimes just doesn't come back on. And I've tried for a couple of months but I'm just never going to get used to the keyboard.
Though, I did finally actually use the Touch Bar in Photoshop to do something. I accidentally hit "buttons" on the touch bar more than I've ever used them for anything.
I wish I'd just waited for the new iMac for doing real stuff, though the display on the 2016 is great. But my life is a series of bad decision, next of which will be me selling it and eating $800.
A lot of the problems you mention are external monitor related. How do you connect to the external monitor? Have you tried getting a DisplayPort to USB-C cable and just using that?