Unlocking Mastery Tracks (Idea)
Agreed—though ideally unlocking, say, gliding would give you access to the most basic gliding tier, since it’d be odd to talk to an NPC or something who says “here, take this glider!” and then not be able to use it until you’ve filled your mastery bar.
Having each tier tied to some sort of adventure or “jump puzzle” (for gliding or mushroom hopping) would be neat as well, though as you say it’s probably not possible at this point.
At the very least I think that, yes, you should have to talk to an NPC to gain access to the new mastery tracks. The only issue here is that you’d have a period where your mastery XP isn’t doing anything for you, but that’s easily solved by having at least one track available without an unlock (the Pact Commander track would be ideal for this, though if I understand correctly you can’t train Central Tyrian masteries in HoT zones?).
Yes, Pact Commander would be ideal to be unlocked from the start in Pact Tyria, and I’m actually okay with the Gliding track being unlocked from the start in the Maguuma Jungle since it is not tied to any specific race or character in lore, its just a thing our character develop while in the jungle. We could have an NPC mention it right at the start of the map, maybe even in the first personal story instance, and that would cound as the unlock, or something like that, since I really see the gliding being the first mastery the great majority of players will start mastering first.