Thanks a lot ! I worked on Unity for some small game projects and wanted to switch to UE, but I was too scared of the complexity to switch. I think this will help me to finally start UE.
Interesting, do you plan to make it available for other languages ?
I'm not an expert of testing but I don't know if something similar is already in the market.
Your point of only retesting the diff is great, as it will reduce CD costs a lot on big projects :)