For me personally, if Apple continues on the same path, I won't even consider purchasing another MBP. Using Lenovo p51 at the moment, because MBP is a complete dud to me.
Keyboard fails easily. But ok, they will fix that eventually.
My biggest gripe is with the TB. As a developer, and touch typist, I simply can't stand TB at all.
And for those advantages, well, I have to disagree... Almost everything TB can do, you can also do with keyboard shortcuts. And with kb shortcuts, it is way faster and easier. And you don't have to look at the keyboard while doing it.
Another thing is, TB does some very basic stuff way worse then fn keys. Like brightness, volume and simple stuff like that. And almost everyone uses those things on daily basis.
If they don't offer a 15" nTB MBP, I'm not purchasing one. Because I don't want to purchase a device that makes my work harder. I want a tool that can help me to get my job done in time, and not some gimmicky distraction that was put there without any good reason at all.