Only Apple knows, equally I have never seen so much traffic regarding a Mac's keyboard, nor is Apple ever going to be forthcoming rather very much the opposite as it did with the MBP 2011 dGPU debacle. You just need to make a decision yourself, some have issue, some don't, however once out of warranty the repair is indeed costly.
Personally I wont purchase the new MBP for several reasons the reliability of the keyboard being right up there. As I've stated previously I find it absolutely ridiculous that Apple did not adequately test the keyboard prior launch, just smacks of incompetence and a complete disregard for the customer. Every 15" I have tried has had uneven key loading, especially if hot from heavy workload, nor worth wasting my time to review again until the next update in 2018.
One of the major triggers for me is the number of people who are having repeat issues, which rather lends to the problem being temperature/workload related coupled with inadequate design rather than a few non-conforming units getting passed QC.
Apple needs to get off it's high horse and stop with the corporate hubris, openly and publically recognise it's mistakes and provide solid solutions that don't involve the same poorly designed components over and over again. Currently all Apple is doing is just burning it's credibility in many circles...
Q-6