i'm not so sure, i could see why sword int he stone wasn't added. If you think about it, arthur would look young in BBS, but when the world actually appears he will stay the same age?
What are you talking about?
The Sword in the Stone would have been perfect in BbS. Merlin had mentioned in KH1 that the King asked for his help. And we know for a fact that Merlin was not originally a resident of Radiant Garden based on KH2 dialogue:
Hmm... I'd be fascinated to ascertain as to when the town got such a
dreadful name as Hollow Bastion!
This, of course, was retconned given that he lives in Radiant Garden in Birth by Sleep. Hah.