Great job on 4.9! Looks promising 
However I encountered a change in custom thunks with array properties that I can’t find in documentation, notably how UArrayProperty is fetched and how blueprint stub functions are declared. It causes crashes during compilation which couldn’t be traced back to any of my functions. I managed to fix it by following and comparing KismetArrayLibrary.h from 4.8 and 4.9. Any comments on this? Which small changelog line did I miss that mentioned this? 