It'd be very cool to see if villagers could enter a tall building and enter into a specific room to spend the night in away from zombies etc... In all seriousness though, what is there to expect from villagers in 1.14?
Villager pathfinding is being updated, yes. I dunno if it will be part of 1.14 or if it was pushed back/planned for a later version, but it will include a scheduling system. I'm guessing they wanted to get some of these enhancement projects out of the way first since it's likely the new functional blocks will play a part in this system.