He won't snarl in the face of opposition defences like Scott Brown but if he maintains his early-season form he could easily become a replacement for the Celtic skipper in the heart of Alex McLeish's midfield.
If there is a valid criticism of Jack he needs to become more physically robust when dealing with the slings and arrows of midfield combat.
Rangers could have done with him in that 25-minute spell against the Slovenians last week when they lost a grip on midfield and conceded a goal that may yet prove costly in their chances of qualifying for the play-off round.
But while Paulo Sousa's side might not be littered with household names, it's no coincidence Swansea have surged up the league now they've got their midfield mojo back.
"Newcastle are a massive club and can easily still be thought of as a Premier League outfit," said Leon Britton, the 27-year-old expected to feature in his midfield role on Saturday.