Could you link to that cast?
I was asking because crossing over to reviewers just 'cause, or "because it would be awesome" is generally not a good idea and rarely produce something noteworthy. Most of the time, it isn't horrible either, but you just don't get the feeling that the other reviewer broad in something particular interesting. Especially if it is written by only one person, it often feels like you get two people saying what otherwise only one does. However, if the two do mix well and you get something that is more than its sum, I'd fully support this.