Correctness and robustness are the main factors behind the design and implementation choices we make. A significant part of the overall engineering effort has been on stability for a long time. We're now making it closer to 90% for a while.
None of this is unexpected in the development of a complex system, especially when there are many factors involved in deciding how much to focus on various aspects. I have worked on a few unrelated systems which turned out to be stable and successful when released and - at a comparable stage in their development - they were much less stable. So personally, I am very optimistic about CockroachDB.
Just reads like a lack of QA in general with most correctness effort focused on protocol design itself.