I like the highlighting feature, but I think it doesn't work correctly (or it works the "wrong" way). At the moment it shows the scope that is affected of the refatcoring (extract method to class for example highlights the whole class), but I think showing the region that will be rewritten by the refactoring would be more useful.

Anyway, more important is that one can disable the highlighting color or at least change it - it doesn't look nice on my dark theme.