All of your improvements are dirty hacks. If someone have a Problem with a Software that worked correctly for years it's not an Issue of this Software. It's your fault! btw hacking software without permission is illegal.
It is quite common for software to work perfectly will with bugged libraries, and then when that library is fixed, for it to stop working.
As for it being illegal, I doubt anybody cares to be honest...
No-one's forcing anyone to use a third-party modified version of intuition.library, so I say go for it! If you don't like it, don't use it.
