Why Athletics as a seperate ability score?
My gut feeling would probably incline to something like
Might (STr/Con)
Coordination (Ranged Attacks/Finesse attacks - possibly all melee - part of Dex)
Reflex (Initiative Armor Class part of Dex)
Education (Knowledge aspects of Intelligence)
Perception (part of Wis)
Willpower (other part of Wis)
Self (Charisma)
Athletics works better as its own thing.
D&D discourages swashbuckling themes by splitting up the athletics − run, jump, fall, climb, balance, tumble, etcetera − between both Strength and Dexterity.
Athletics covers every body stunt and mobility. As a separate ability, it works perfect.
Then Strength handles tests of brute Strength (and extra damage), and Dexterity handles cautious precision and manual dexterity, like aiming a bow and stealth.
A separate Athletics also makes sense of small creatures that comparatively lack strength but are extremely athletic and mobile.
The most important thing is to ensure that the abilities are defined bottom-up: things that players actually roll for − perception, hiding, hitting, dodging − rather than vague abstractions that practically never happen during gameplay. (Looking at you, "good memory" "book knowledge" Intelligence. I have never rolled to see if my character "remembers" something. But even if it happens via a lore check, it would need to happen in almost every encounter to be worthy of an ability.)