Well see.
They chose to reduce mod releases to every 2 months. Here is one of the reasons stated.
https://f95zone.to/threads/lab-rats-2-mods.32881/post-7106124
They could have used that time instead to write a new base code system and get rid of stuff like you don't like.
Or they could have used it to tear out stuff like you are talking about. However, they didn't choose to do it.
As he pointed out it takes them time to merge the mod back into the base game each time.
It doesn't take me anyways near the amount of time it takes them to bring my mod to the new version.
While my mod is smaller that is less of a factor in this.
The biggest factor is how we approach the base code.
They created a bug fix / patch and then a mod that works on top of that.
Frankly, if I wanted to do what they are doing. I would scrap Vren's base code entirely then just use my own.
Right now they are each month they have to effectively reinvent the wheel just to keep dealing with his code.
If they made their own base code they could just use it. Then whatever types of changes he made they could implement it or not in their own code base in a proper manor.
That would be a lot less work than what they are currently are doing and they could use that extra time to make mod content instead of trying to re-implement their mod each month with Vren's crap code.
The thing is if they are going to go through all that trouble the only thing they need to call it their own game would be images after that point.