Oh so she knows her work is fundamentally flawed but is either incapable or can't be bothered to fix it after so many years and dollars she's received, thanks for the clarification that's so much better!
/s
She has revamped several areas of the game over the years. Every time she opens up a new area for modding, that section of the code has to be cleaned up and refactored as well, to make templates more manageable. The problem is, the game stands on bad foundations (old Java version) and a serious revamp from top to bottom would be akin to tearing everything down and starting over from scratch.
The engine would have to change as well because Java 8, specifically the version she uses, is quite old too. However, that would imply learning new code and the gimmicks that come with the new engine. All things together, we're looking at probably a year (or more) dedicated exclusively to this endeavor. After that, comes porting all the existing content into the newer iteration, assuming she doesn't change her mind and scrap what was done for something else. It would be a long time before we'd actually see anything new.
Yeah... it's easier to keep things as is and revamp as needed, than to start from scratch.
I simply don't see Inno with the inclination or will to start over. If things ever get that dire, Inno will probably just pull the plug and move on to something else IMO.