I know you guys get pestered a lot on the whole "so when is 2.2" coming out. And I certainly understand why you don't want to give a hard and fast date for many reasons (stress, time constraints, hitting issues you don't expect, delays, etc). Still, I, and I'm sure many others would like to know about how things are progressing just to get an idea of what's left to be done and what's being worked on. With that in mind, I might have a solution if you all are interested.
I came upon this website when I was looking to buy Subnautica. To keep fans of the game in the look of what's being worked on and where they are at in the development process, they use a site called "Trello". Basically, it lets you setup your own categories and then list what's being worked on, what's still to be done, and what's being pushed back to 2.3. Even if it isn't made public, I still think internally it might be good to have to keep things organized (assuming you don't already, which you probably do so nevermind). In any event, this would allow people to get an idea of how close 2.2 is to actually come out. You can even have estimated dates for certain particular parts of the projects (such as going back through the GC or fixing models X) if that was your thing. Again though, I understand not wanting to put updates you may not be able to make.
Here's the link to Subnautica's Trello to give you an idea of how it works:
https://trello.com/b/yxoJrFgP/subnautica-developmentIt's cool if you don't think this is for you guys, just something I saw and thought I'd pass along.