Basically it means it was mostly linear. The events led to the next with little variance, some dialogue changes based on your choices. Now he has to do entirely different scenes and branching paths based on all the points you've accumulated and where things are going to go. So if you want updates to still be an entire day, it'll take longer, because instead of making event 1 and 2 and 3 and being done, he has to make 1a 1b 1c, 2a 2b 2c, 3a 3b 3c, etc.
This is just the nature of a game with more than one or two meaningful choices. The closer you get to the end the more choices you have to account for and the more branching paths and variations you have to make.
This is just the nature of a game with more than one or two meaningful choices. The closer you get to the end the more choices you have to account for and the more branching paths and variations you have to make.