"I cant wait to play TBC where i get rid of all the currencies"
I hate to break it to you man but tbc has even more currencies....
Apexsis crystals
badges
marks
primals
honor marks
all 5 pvp badges
and more.
also are the things really that confusing?
Stygia is literally just from the maw, and used on venari
anima is literally just from everything and used on pets/toys/base upgrades.
soul ash is obtained from torghast and literally just used as a thing for legendaries, are you confused by arcane dust used by enchanters?
Renown is literally not even a currency, its a progression thing.