If there was any clarity as to when we could expect a new MBP, I'd very strongly consider waiting. But otherwise, I'm thinking I'll just bite the bullet on the current one, mainly because of the keyboard (entirely subjective, but I very much like it), and the screen (just as subjective). Anecdotally, I've seen a reasonable number of people say that the new MBPs run cooler and quieter, which, to me, is very appealing in a laptop.
As far as TouchBar goes: while playing with it at the store, I found some reasonably cute uses that might offset the loss of function keys, such as the seek-bar for Picture-in-Picture or AirPlay videos. And, of course, TouchID.
I guess what I'm trying to say is: if at all feasible – definitely wait for a refresh. But, personally, after taking the time to think about it, I've found sufficient reasons to upgrade even to the 2016 model.