It seems as if the TOS episode "Arena" has been totally retconned given how the Gorn are not only known in 2259 but have destroyed several Federation colonies and have even sent the Federation detailed border lines. They fully obliterated a Federation Starship and have been intimately encountered by every single TOS main cast member aside from McCoy, Sulu, and Kirk. Captain Kirk now definitely knows about them 8 years before "Arena".
Uhura and Chapel didn't know T'Pring in "Amok Time" but have clearly met and interacted with her in Strange New Worlds.
Chapel's declaration of love for Spock in "The Naked Time" now seems redundant as they've apparently dated and copulated in the past... Something Spock couldn't do with Kalomi until he got blasted by Spores in "This Side of Paradise"
Is TOS just not canon anymore? How long until Paramount admits that SNW isn't a prequel to TOS but rather a replacement.