I don't think Goater would be great actually. More to the point, none of these are well enough known to anyone coming in in the last 10 years. None had stellar international careers or won much domestically. Studio pundits need to be recognisable to some degree.
It still comes back to the studio people needing to be objective and good at what they're there for. If City are awful, and one player has a shocker, then there's nothing wrong with that being highlighted, and even better if they can offer explanation of why it's happening or how to fix it. As it is, they default to sniping at the club generally, or unbacked abuse. A case in point is Mangala. He's had a few shockers, but I would expect a pundit to be able to spot that one recurring reason is the left back being miles out of position, leaving a massive hole which Mangala is unsure of how to cover.