I have a couple of suggestions that could make this class better, but right now the requirements for stealth are too much for the benefit.

• Possibly lower the amount of time it takes to go into stealth?

• Have rogues sneaking speed be the same as their walking speed?

• Don't have stealth be lost when standing up after sneaking?

• A more radical change, but rather than less noise: Stealth gives invisibility.

These are just suggestions, but I think they would allow the class to be equal to the others.