It is strange, it fails the unit tests because of different noise patterns, but appears to converge to the same result. I'll do some more investigating to find out where things take a different path.
It is possible that transform is slightly different, which causes rays to bounce a bit different? Surely worth doublechecking if that's something expected and something what is indeed happening, but i wouldn't be too much concerned about noise changes.
As for the feature itself, yes, let's bring it back!