Some more stuff you might not have been aware of can be found on Lars' blog, including some excellent tidbits about the lore, upcoming characters, and things they're working on:
I get that this might not be the development pace you're used to from other projects, but I can only restate that they rewrote the entire engine for this sequel.
Taking another excellent Indie game as an example, The Banner Saga was released in 2014 and its sequel only two years later.
The main differences here is that the sequel was planned from the beginning and that it's entirely the same engine (and world, etc.)
Would I like to hear more official news and updates myself? Yes, but not at the cost of dev resources.
Am I getting impatient? Maybe, but it's mostly just very positive anticipation.