Yes we would absolutely like you to revisit this recent design choice that is a mistake that invalid other features. With your answer I feel like you didn't understood the issue correctly, so let me rephrase it, for clarity.
The game provide the option to manually assign any door as a front door, but now you are telling me that this long time feature is totally useless now, because your recent "design choice" is automatically ignoring this and reassigning the closest door to the lot's spawn point as a front door every time we load the map. Is that correct? How is that a feature and not a bug? It totally erase the other functionality that allowed us to manually choose the front door.
Also, an other point, with the business expansion pack, we have a shop and a house, so we don't want people to ring at the shop when the intention is to ring at the house or to have sims come back home and pass through the store for some reason. And even without the business pack, we want the option to choose which door is the main door. (Like we were always able to do before).