I don't know that I'll ever embrace the TB, though. Tactile response doesn't matter so much on a phone since you are looking at the phone too. But our eyes can't simultaneously look at a screen and a keyboard. I appreciate that some people enjoy the dynamic flexibility that the TB affords, but as someone who uses those function keys extensively, the TB is a huge step backward for me. I could have lived with all the other sacrifices and compromises, but the TB is the deal-breaking reason I returned the 2016 15".
This is great news for me ... I type quickly with all my fingers. But I cannot operate the number pad or the function key pad without looking.
I tried the 2017 v the 2105, and I tried to buy a refurbished 2015 2.8Hz 512GB with the 390 GPS card. But the system hung, I rang Apple, and the computer was gone. Then it came up again, I was on the phone with Apple, but the one I bought did not have the GPU. But there was a higher end 2017 model available elsewhere so ... I bought that.
After using both keyboards, I found my wrists were anchored, but were outside the large touch pad. That was a win for the newer machine. I also found the keys actually larger than the 2015. In fact the keys resembled a little my Macbook Air circa mid 2012. But its keys felt smaller, and so too the keyboard (although I think they might be close in size).
I didn't like the touch panel but after finding out I can touch I think the Option key, who knows it might be just fine.
The smaller size is a benefit, but the lack of ports annoys me. I'l have to handle that ... I've had to suffer before SCSI drives that cost much more, then Firewire drives that cost much more, then Firewire 2 drives that cost too much. At least most notebooks of any quality are coming out with Thunderboit / USBC 0 3.1 ports. I'll miss the lack of magnetic coupling for the power, but then, my wife's HP Elitebook charges with a USBC 3.1 charger. And the HP can only accept on of its ports for the USB charging - I think the Apple ports will all charge the notebook.
Unfortunately you only have two months to decide on extended warranty ... I doubt I'll do it. Because I'm Australian and Australian law should give me protection against a keyboard failure three years form now I reckon.