You can easily make a dev blog about a planned feature, that might not be implemented in the game yet, or they might have made such major changes to it, that it was pulled to be implemented later. Some of the major reason for the delay of the game, was that they scrapped the entire engine they were using to make their own, to make making the game and future modding alot easier. Also to make the game prettier/better. Kind of like what happened to the lost Diablo 3, that was scrapped after screenshots of it had leaked, to come out several years later a completely different game. Lets hope Bannerlord is far better than the bad game Diablo 3 ended up being though.