For an nzb containing a single item (one movie, or one TV episode) the final output file could just be renamed to the nzb name. I'm 99% sure that is already an option in Alt.Binz (but I have it disabled):
Setup > Par2 > Unrar > Auto rename video file to collection name
For an nzb containing a collection of multiple items (for example a whole TV season), that would complicate things. If Alt.Binz already can handle that I am not sure
Edit: After re-reading the original post, I suppose auto extract / rename may not work if the files have no extension
If there were an sfv file (and no pars) Alt.Binz can use the sfv for renaming. I do use that. Not sure if it is automatic or requires a setting.