Potential Mastery Options for PoF and beyond
Uh…. no…. Mastery tracks are a gating system, not a reward boosting system. This limits its usefulness to Utility, Mobility, or World interaction. What you’re describing are drop buffs already in use in the game as map specific buffs or collection specific triggers, and done that way for a reason. More over, the things you suggest as rewards are much better left to either Token vendors and/or meta reward chests, as it wouldn’t logically require mastery points beyond whats needed to participate in the events themselves.
Also don’t understand why you think this should involve mastery tracks outside of interacting with a vendor, when the whole point of it is to gate that content behind the same kind of “grind” your proposing with mastery track specifically assigned to unlocking token drops.
Because its gating optional content, you dont need this skin but you can go for it. And the Mastery Tracks are not exclusively a gating system, the one that allows you to fight the champion exalted for example. This just gives a better reason to have them. And if you dont want the skin you dont have to farm achievements to get the points for it. The true gameplay is availible to all without sitting and grinding for hours, but those who want to grind can be given something for that.