I severely doubt that they would have focused on map design more if they decided that face rubbing wouldn't be a thing (especially since the models don't seem to differentiate too much and they seem to have a base). They probably would have went into a different extra feature that would appeal to the same fans that would like rubbing faces, because that's what they were trying to do in the first place. If they decided to remove face rubbing, they wouldn't just jump off of the idea of adding extra features. That time would just be thrown into a different extra feature they'd create.
Everything is done with a purpose. The amount of time they put into face rubbing is meant to be time spent on extra features that will appeal to a wider fanbase than the standard player. They went the right direction considering how well Awakening did.
Touma is pretty bad though. Most of the maps were either really tedious, obnoxious, gimmicky, or very unrewarding.
If you're one of the people that doesn't like the feature, it's 100% an optional feature. Disliking a game because of two completely optional features (any feature outside of the hot springs/amie is very arguable) is simply silly, regardless of how "dehumanizing" it is. If you think it's dehumanizing, don't use it. A lot of people aren't using it because they simply dislike it, let alone other reasons to add onto that. From someone that has played through parts of 2 of the paths and what I've read of other paths, you're completely fine not using the feature.
Sakurai is 100% right that optional features are just that: optional. Just like tournament mode, for glory, classic, smash tour, etc in smash bros. If you look at one optional feature (or small things like big breasted characters with sex appeal) and try to make it out to be more than just developers trying to appeal to a strong specific fan base that played through Awakening, then you're going to enjoy the game less regardless. IS made the right decision based on how many people played Awakening.
Also, implying that you don't get to enjoy characters for their personalities and actions as individual beings with agency because of optional features is simply your fault, not the game's. If you're letting a feature that you literally can remove from your castle completely and make it not exist on your game ruin the actual story for you, then that's not the game's fault. That's simply you having a mental block. Face rubbing has no impact on the story at all. Characters don't develop through my castle. They develop through building supports and the story outside of the castle. >_>