It's honestly not a bad idea, but it'd require a completely new currency to be added into the game. I suspect that the reason the PUS is the choice of store due to the fact that it's linked to the website.
Therefore no actual changes such as extra currency have to be made in-game.
Don't bother man, these people get upset when they can't just run at a target and kill it. They've never heard of itemization or strategizing, they just wanna scream "mages OP" rather than work on their faults.
I do think level 80 would be a nice starting point though, but I'm okay with either.