Spectacular at what?
https://www.espn.com/mlb/player/splits/_/id/40423/gavin-lux
He was under a 678 hitter for every month but two...July and August he was white hot. But that only averages out to a .703 OPS, which still would have been right there with everyone's favorite 1B, Andrew Vaughn.
464 April
678 May
591 June
937
884
659 Sept
-2.1 defensively even with the position change from SS to 2B...that doesn't scream the centerpiece of any trade, because two years of Lux just equals (maybe a QO) but likely another trade/flip before free agency. Then they start over again with the next iteration of Vargas.