What purpose, does Nerfing Single player saves, service?
There is no “Balance” to be disrupted, so I cannot fathom why the Barbarian, or any other character needs to be nerfed, when they do not interact with the multiplayer economy.
Why are the not the same as they were when they were originally released?
How exactly is single player being “nerfed?”
Off the top of my head… Leap Attack area/weapon type damage, Magic Arrow used to build mana when maxed out, etc, etc.
It really makes no difference where they are physically stored, it is how they are stored in the game
What does any of this have to do with single player specifically?
And what do you mean by “used to build mana” ?
Magic Arrow becomes free at level 13. This has been this way for… as long as I can remember.
But again, nothing you mentioned specifically “nerfs single player.” These skills work the same in single player and online.