I'm going to be honest, the game still feels very much incomplete, even if you add a new attraction. Having all the girls work in all the buildings could be a reason, but I think the bigger cause is the lack of content in general.
WTE comes across as a sandbox, rather than a management game. Resources are mostly overflowing to the point you barely notice they are even there, and there's no way of spending them that feels meaningful.
Of the girls, only Hana has a friend you can visit or have visit you during day or night both, while Kaisa has a night exclusive "have the friends visit you" kind of event. Iono, Tifa and Peach don't have even half of that.
Most of the outfits and events for Lily are unlocked at the beginning of the game, which is to say there are few, and she barely gains any new ones as the game progresses. Since she doesn't work on any of the attractions, she just stands there menacingly, which feels wrong.
There is little to do while passing the time to progress the girls' corruption meters. Gameplay loop right now is just "Put the girl to work, watch the new scenes, lock her position, spam the buttons to pass the time and accepting until she reaches a new threshold, unlock, watch the new events, put the girl to work, rinse and repeat from the beginning." There's no engagement from the player, it's like a visual novel with extra unnecessary steps. The greatest offender is the massage parlor, it had a decent amount of different points of interaction with Peach, but when added the next two they had less and less different ways of increasing the meter, with Tifa having only two... The player just repeats the same dialogue over 6 times before the final prompts and end of the "interaction".
The dates are also very specific. You can only have them with certain characters in certain localization, and there's little to no change if you invite them one by one than if you just invite both and watch all the possible outcomes there.
And all of this is just based on the voids that need filling within the existing game, which illustrates the severe decline in content quantity AND quality (gameplay-wise) as production of the game progressed. We haven't even talked about the promises to bring more and different girls, since these 5 we have now would be "the main ones". WTE promised to be an ambitious project, where the player would be able to fulfill their fantasies with many different characters from mainstream media. And that promise is also being broken right now with this announcement.
The worst part? Is that it feels bad precisely because we had expectations. The art is amazing and we want more! The girls are written in a way that makes them likeable, and we want more! More time with them, more content with them, but also more and different girls! At the very least, some events with other girls from the same franchises as the main ones. Sombra, Widowmaker, Miss Fortune, Yuffie, the other girl from A.V.A.L.A.C.H.E. whose name I forgot, Daisy, Rosalie, maybe even Nurse Joy? Those are some quick examples I can come up with from the top of my head of characters that would fit into the story and world of WTE.
There is PLETHORA of things that could be added to the game, so ending things in only 4 updates... We're going to miss on a lot of those, I feel. Which is why to me the game still feels incomplete: it's not that we haven't added 100% of what could be possible, it's that we haven't even finished adding half of what should be expected.