1st: Very bad idea to add 6 new different items. what makes it worse is that those are just tokens (placeholder). On the current inventory space discussion its way too much!
2nd: Letting those item only drop in specific content. SE is too scared that content will die out, but forcing players doesnt help either - it just causes more frustration!
3rd: To be honest: First time I have seen in NORMAL mode (story) a boss going enrage frequently with different groups. Havnt SE said it will be mechanic based fight and not DPS check?

There is a reason why content will die out, and mostly because its no fun!
Stonefarming is much more fun than midas gear farming, just because you are not forced in a specific content... well... in theory because primals with 10 or less stones is a joke!
SE is calculating from a player who can do 24/7 the same content - lets say the fight duration is 2 minutes and you get 1 stone each time = a lot in 24h -> thats an inhuman calculation!