To all the "we have so much inventory space": You should not forget, we have also much different stuff that we have to store in that space. Especially as crafter and gatherer. I've played some other games before and never saw a game, where you need so many different mats for crafting.

Next: If you pay or not. The storage on the server for the paid retainers is allocated for every character. Or how should it work that you don't loose you stuff on retainers you discontinued paying for?