I like the idea of Jump potions; however, I think there should be limitations on when someone can use it. For an example, someone can only obtain a jump potion if they have a character with a job already at 60. This means if you're hoping to make an alt, you can just purchase the potion and get much of the painful grinding out of the way.
The only issue I see from this is someone who buys the potion for a job they have no idea how to play and won't take the time to actually figure it out and going into these dungeons and making things more painful to get through than they should be.
The only issue I see from this is someone who buys the potion for a job they have no idea how to play and won't take the time to actually figure it out and going into these dungeons and making things more painful to get through than they should be.