Hall of the Novice reworks :

Healer : learn to dps sometimes between heals

Tank : defensive GCDs does exist and are a must have, learn to use them

DPS :
No need to learn to focus what attacks the healer, since it's the tank's job to provoke
No need to dps what the tank is targeting anymore since the tank has it's stance very early and can just spam AOE attack, we're pass stormblood

Overall :
Put OGCDs between GCDs (overall), what's an instant cast ?(heal/casters)
Make it a must do before sastasha, not an optional "hey just pass by this npc it exists even tho you didn't read and have no idea what it does", evenmore if the player is playing tank or healer
Make it a must do when the player gets his first tank to lvl 15 or grabs a new tank lvl15+ (drk, gnb)
Make the NPC dialogues less loooong, if the player fails the test they can still read the tchat or talk again to the NPC