Sounds to me like the jerky nature of the car alone is reason enough to go back to stock. Safety rules...no matter how good the lowered suspension makes the car look, even if you can afford new tires ever 10k miles.

My rears are already getting excess wear on the inner tire edges with the stock suspension. I can't imagine what lowering will do to those poor rear tires. How many miles are you getting on the set of tires?