It's not shorter than Haunted Mansion 2, I like the endings, the only thing is that I feel there are fewer decisions to make, the routes have more potential, I would like a small expansion, maybe it's also that with the 2 haunted mansions, I got hyped and was hoping for something more contained

If your looking for more ideas here are some (if your willing to add an expansion that is)

1.A few more interactions with more characters. In the start where you end up in the playground area you could have more interactions with some of the littles there perhaps one of them could get you in trouble or lead you to a new ending.

More area and interactions in the arcade area maybe.

More nurses and staff in the hospital area wouldn't hurt (maybe even a doctor or security guard perhaps)

Maybe more interactions in the barbie building too 

And maybe more doms you could be shipped out to (maybe by having a nurse or the mc mess with the shipping address for the shipment box)

And lastly more hypno vids (I love the hypno vids especially the abdl ones)

These are just some ideas I wanted to spit ball at ya

Hopefully these help

Part 2

Just had a few more ideas i wanted to spit ball if you woild like . (I do hope these ideas could help you tell me what you think of them)

Extentions to some of the endings.

A few endings seem a bit short. 

Like the one where you get shipped to some lady's house and you give in to be her baby just to end up sitting at a table having a tea party with your new sister. I think you could extend it a bit maybe have the sister tease you more like the cheerleaders did in the first game. 

Or maybe when you get trained and sent to the English woman's (is she english?) Ending you just get her complaining that you soiled your nappy then it cuts to the thanks for playing page.  Maybe you could have her do more baby things to you (perhaps bottle feeding in a highchair like the second game or have her do something to "take care of her babys adult needs" like the woman did in the first game.

Alternatively you can add more endings like have the mc call the police and end up in another government facility or insane asylum to be brainwashed or mind wiped like the first games alternative endings.

Or maybe having a second interaction with the mom and daughter duo if you get shipped to her place a second time (maybe getting punished somehow for escaping.

What do you think of these ideas let me know plz.