Pogba was left on the bench in United’s last two Premier League outings, with Ole Gunnar Solskjaer instead bringing Scott McTominay and Fred into his midfield alongside Bruno Fernandes.
The Frenchman has returned to Solskjaer’s starting lineup for today’s crunch clash with Arsenal, nevertheless, having impressed in Wednesday’s 5-0 Champions League win over RB Leipzig.
However, Keane still believes Pogba is missing the “character and heart” required to play for United, insisting his talent alone is not enough.
“Pogba's performances over the last few years for United to me haven't been good enough. It's as simple as that,” the former United midfielder said on Sky Sports.
“There's an obsession at the moment of protecting the back four, but United lack creativity going forward.
“Fernandes has been brilliant, obviously Van de Beek hasn't had a look in.
“I’d like to see him (Van de Beek) there. Why not? I've seen McTominay in there, players like Fred, Matic. They've all had a go but to me they've not done enough, they've not been consistent enough for me, in terms of Man United closing the gap on Liverpool and Manchester City.
“I’m not on about when they're competing with teams in the middle of the table, they need to be competing against the likes of Liverpool and Man City.
“When you talk about energy, the amount of arguments I had playing in midfield with centre halves. Everyone is obsessed with protecting your back four. United need a bit more than that.
“We talk about energy but you need more than energy in midfield for Man United. You need creativity. You need lads with a bit of character and heart. And Pogba hasn't done enough.
“I think it was Bill Shankly who said years ago, 'sometimes with players they turn up and you don't know what you're going to get'. Pogba is like that. That is no good to you if you want to win league titles.
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“For all Pogba's talent, he should be in the team, but he doesn't do enough. He doesn't do the other side of the game. He doesn't show enough spirit, enough fight.
“He has talent but that's not enough to play in midfield for Manchester United. You need a bit more than that.”