First i must ask where are the pet/boop/steal the goose buttons ;)
On a serious note i did enjoy the game, i did not play the first game toiletrooms so I cannot give you feedback comparing the two.
But for feedback towards this version:
For the UI:
The lighter and other hand items seem to be above dialog boxes which can make it hard to read, so having the dialog boxes forced to be top layer of the gui would be a good idea.
For Gameplay:
The valves were Too large and only on walls, making them hidden in stalls and behind bars or on the roofs and of varying sizes, but still obviously standing out (Valve handles being a color that stands out.) would be a welcome change, adding both difficulty and uniqueness.(please do not randomize them though.)
The Monsters Ai needs some adjustments, either by having it stalk the player more closely or have it predict your pathing based on movements to try and block you off after it sees you,
Maybe Allow you to go into stalls and close the door to "hide" but also allow the monster to open stall doors.
Suggestions:
Lastly i do not know where you plan on taking the games story but based on the pipeman i assume it will be plumbing systems next?
Which would be interesting, but also maybe later you can add in other bathroom types with own unique monsters and goals.
Instead of just the current deprecated bathrooms, we also see others like maybe old Japanese bathrooms with squat toilets and monsters based off Aka Manto, and Hanako (Japanese youkai/folklore)
Maybe even a bonus Easter egg futuristic type bathrooms that are all clean with a roomba based monster and have all the toilets and taps hand dryers ect. auto turn on when the player walks past making sound for the roomba to head too (in other words a "monster" that is blind and attracted to sound)
Anyways I can't wait to see where you take this, hope at least some of the feedback is helpful, And i will Hopefully survive all this pressure build up that has knocked me out while going down this pipe in this very cramped barrel (i'll try not to roll.)
I did leave feedback in the video right after playing (which i'll be removing from the video at a later time) but the feedback i am writing here is after i had time to think about it a bit more.
Edit to fix section header size.