Ha-Seong Kim is coming off back to back 5+ bWAR seasons, 4 fWAR seasons, and fills an immediate need on the infield.
That's not some wild dump of Manoah for a jobber with no upside.
Toronto probably has, at this point, some offseason insight into what Manoah is doing and how his still is looking or developing in the lab so they have more information than us to inform a trade, anyway. If his s*** looks to be recovering, then keep him. If it looks as flat as 2023, then there isn't much reasonable hope of upside is there?
Sometimes the right move is to dump a loser. A s*** stock that has lost 80% of its value can always lose another 80% of its value.