I'll wait at least a few months before believing any of this.
Apple being Apple, they might not be telling us whether this new keyboard actually does mitigate the issue. If they said something about this keyboard being more reliable, but then the improvement is not big enough for the bad press to stop, they'll look worse.
Not that I have any interest in defending Apple; I'm still using my 2015 MBP and avoiding the new ones, and I use Linux and Windows desktops. It's just that Apple can be really smart with PR sometimes, and I don't believe anything. Not even what they say they didn't fix.