"Or something similarly insane?" basically means you have no bloody idea, do you?
My main concern is that a single armor piece will cost 100 tokens, and you only get 1 token drop per boss, or something similarly insane.
Oh, but hey! You can use gems to buy tokens! Better rush to our cash shop! Hurr durr! That's my primary concern.
Where did you see the confirmation that the armor pieces will on average cost 100 tokens, and we only get 1 token drop per boss?
Your primary concern has no precedent, no objective reason to base any assumptions on.
Show me such a token in the cash shop.
You know what Yoda said about Fear... ?
Are you familiar with the term fear-mongering?
Your initial assumption is already flawed, bolded.
I'll explain. You know how ANet said there's no healing class, and that any class can heal? Obviously it's the Guardian and the Elementalist a little, but ignore that for a second. My Warrior can heal, sure. But to do that I'd need to be at least level 40 and have spent 3 to 4.5 gold to unlock the grandmaster trait that makes my shouts heal. Because that's the ONLY way you can heal nearby players. So if a group is looking for people who CAN switch to that role once their cooldowns hit, my Warrior is out of luck, because you can't make that kind of build. Of course in this case that trait is in the defensive attribute, meaning to get it you'd need to be exclusively a tank. Which we know is a stupid thing to do to your attributes in PvE because that mechanic doesn't really work and ranged combat is king. But I digress. Point being, just wait until you're about level 40-60. Otherwise, you'll be limited to some really terrible builds.
Healing in GW2 is not a role. It is but a small part of the role many acknowledge as Support.
Why would you want to lift this particular small subset out, turn it into a role and subsequently complain you can't do it until X levels?
Can you fill the role of Support from the start?