Sounds fine to me. I like him and Greenie on together.
No thanks. Greenie and Golic work out good, in my opinion. One of them is a good "host", while the other is able to be there to, at all times, bring in the perspective of someone who has actually played competitive sports beyond the JV level.
Pairing up Greenie and Cowherd would lose that perspective. Obviously they have guests on, but I like that there's usually someone in a chair "full-time" with that experience.