He's playing better than in Ajax, just a more well-rounded player who's certainly way more mature, polished and outstanding athletically.
He is a rare type, he's some weird mix of Modric, Valverde and Kovacic. His passing is gaining stability and range , he's becoming way more consistent in terms of picking good through balls, lob passes, still incredible speed on the ball paired with polished control and tidy DA, no way in hell is he getting pushed or outpaced in duels either.
He's a box to box midfielder with great sense for the goal now with everything what made him special in Ajax, Koeman may have struggled with 4-2-3-1, but did he get absolute best from Frenkie who's the backbone of this team now together with Araujo.
ATT definitely deserves a raise, I'd say up to 80
TS - at least 82- he's just really fast and he is the one chasing counters, he shows his speed very often
BB - he rarely gets beaten due to strength these days, just a tank, 82-83 looks fitting imo
Stamina - 92 - he's relentless, plays every game, runs every game and never looks tired, covers so much ground and doesn't avoid sprints, ground or aerial duels
AGG as Suji said can be bumped to low yellow
I'd also say his passing needs higher values but no recommended values so far, need to rewatch his games to give more precise numbers, but the pass he pulled yday for the first goal is somewhat regular now for him and that looks low yellow SPS imo
Jump 100% deserves raise, other than goalscoring most obvious improvement in his game is just how dominant he became in aerial duels, his success rate went up by 10+% compared to last season.
He's looking like one of the best midfielders in the world, literally no weaknesses in his game, none