Grealish hasn't flourished there either because neither Jack nor Phil are natural wide wingers and making that use of them doesn't enable either of them to shine. They're both more effective playing more centrally and with more freedom, but clearly Pep wants that wide LW job done by someone in many matches and one or the other of them gets lumbered with it. That Phil is now getting criticised for exactly the same things Jack was criticised for last season (playing too safe, passing back) surely implies when they're playing like this it's as instructed. Stick either of them more centrally and you see a different player. If people don't like how they're used when Pep sticks them on the touchline, maybe criticise Pep, not the players following their coach's orders.