There is no way to say if it is going to be better or not-obviously, Apple is going to present a model they feel is better than the one before it (they want your $$$), but what makes it "better" could come down to what an individual specifically wants & needs. In regards to the current 2016 model, some people feel they are much better than the 2015 they replaced, where as other people feel that the 2016 was a step backwards. There is a lot of subjectivity there, and it is a polarizing topic. So you may like the presumable 2017 model more, but you could like it less.
They may make huge changes to it based on user feedback, or it may be a very minor upgrade with minimal changes. Looking at past releases, the refresh that follows a major redesign is generally minor, and usually aims to hammer out some of the bugs and quirks that the premiere model has. Apple may incorporate a superior battery, change the keyboard slightly to improve durability, offer a far more capable GPU, bring back the iGPU 15-inch model, offer a 15-inch without a touch bar, or they may do none of the above.
It seems like we are still more than half a year away from a release, and it is always possible that the release might not come until early 2018 (many analysts are saying sooner, but no one can predict the future.)
