I think there's a bunch of different roles that all come under "pundit" and judging them all against the same criteria probably isn't helpful.
You have the knowledge pundits, the ones who not only have a specific insight into the game, but are able to apply that insight and tell you stuff you wouldn't necessarily be able to work out for yourself, whether it's tactical stuff or things about the logistics of how clubs work or what it's like to be a player.
Then you have the vibes pundits. They have insight too, but they're not necessarily there to shower you with information. They're there to make the show interesting, to express some opinions and show some personality. They show bias, they say stuff people will disagree with, they're there to create talking points.
And then you have the room-meat pundits. They're there to keep the conversation flowing and keep everything ticking along. If you've got a gap in the programme that needs filling, they can speak relatively articulately about not much at all for as long as that gap. If you need to cut to a different story or an outside report, you can cut them off mid-sentence and no-one feels like they're missing out on anything. They don't make for particularly interesting or compelling viewing, but they're manageable and serve a purpose from a TV point of view. They're nobody's favourite pundits but they keep getting the gig. In the better football shows, the only person who fits this category is the one who's also acting as the show's presenter.
Jenas is classic meat in the room. Inoffensive, cheerful, friendly. Knows when to shut up and let other people speak, knows when he's being asked to fill some time. TV presenting experience now too, so conscious of transitions between topics and the kinds of questions to ask to get other people to say interesting things (let's not pretend he's amazing at that, he's hardly Paxman, but still - he can help keep a conversation flowing).
No point in expecting him to be particularly interesting or entertaining, because that's not really what he's there for.