Husband and wife team... what? It is a game studio with many employees. Inform yourself
https://www.linkedin.com/company/taleworlds-entertainment/
If you are not missing any features (despite economy and diplomacy and missiong being completely broken and lacking) and do not use mods to improve the experience I can only assume that your standard and expectations are not so high. Don't get me wrong, the game is still fun in battles, but it is far from a good all-round experience.
I just hope that people who are piling hundreds of hours into it don't burn yourselves out and stop enjoying it before the full game is released