I try to refrain from criticizing these guys as much as possible as I generally expect little from these shows. I'm an easy grader, just give me some decent discussion and a few laughs, and I'm good.
But you're 100% correct in your assessment. Murph needed a "conversationalist" to compliment his inability to talk normally to guests. Tasker is no such thing. His memory might be distorted from the hits he took, but it seems like reads his rundown from the show's producers on his way to the stadium each morning. The minimal preparation it seems he does is apparent.