This should be the way. I really like three interation approach: research, stable, enforce. First you develop fast and breaking things with alpha / beta versio

This should be the way. I really like three interation approach: research, stable, enforce. First you develop fast and breaking things with alpha / beta versions. Then you make it stable with bug fixes and minor enhancements. Finally enforce the code with review, unit tests and code coverage, etc. Theoretically they already have a good game engine (long lasting product) and interested in developing it further. Without enforcement, any future changes have potential to break things. Unit tests (enforcement) reduce that risks and make any changes / refactoring closer with specification.