Currently you can only match "has" or "does not have". The attribute is always just a string, can we have REGEX and "contains" rules on this?
This would make audience creation a lot easier with less work to manually add all possible options you want to include.
e.g. language /en-gb/ or /en-us/. I want to just make sure it includes "/en-" but currently I have to add every possible value in there