So earlier in the season I got a hospo ticket for free, our club affiliated guest was Jay f***ing Spearing! Who seemed like a genuinely nice, intelligent fella to be honest. There was a brief chat and Spearing said that he didn't expect Slot (he called him Arne but until he's won the league, it's surname only for me) to make many changes for the first part of the season and would stick with his strongest XI (11), mainly because Slot felt the club, the players and himself needed a really good start to get the fans onside (might not have used those words but basically that was the jist)
My theory based on the above and evidence of the season is that Slot thinks it's a 180 game season, so I expect to see some squad rotation soon, and only then will we see which players he trusts.