Please release it for the community. This would make it possible to care the game with tons of bug fixes, tweaks and improvements by the fans. It’s what let games like Skyrim alive and interesting to play for so much people since years. While Warhorse can work on their next game, the community can make further update support for Kingdom Come. It was also with Gothic 3. What would the game be without 6 years of community patches?!
You just have to release that both things.