First of all, there is no guarantee this will not mess up your project. so ABSOLUTELY DO back it up, and FULLY test that everything works and builds on your target platforms before committing.
Why you might want to switch to ORK source code is if you want to debug what's happening in code, or you want to make source modifications faster.
Sorry I don't have editing tools installed so could not speed up the compilations parts :D Basic idea is you can use the DLL Switcher plugin to switch references from DLL to source code without messing up you scenes or prefabs.
DO make sure you run DLL switcher on each Root Folder where you might have ORK stuff. These would be scenes, prefabs, events or whatever.
So far this worked on my project. I'll report if anything goes haywire.