Tire wear, what's causing this! ? ?

Why get it aligned if you know the bushing are bad? i wouldn't, it would be a waste of money in my opinion. If the bushings are worn badly like you say the control arms are able to move or bounce in/out of spec as you drive, so a new alignment would likely have similar results... Seems like a bandaid to a bigger problem. Id replace the bushings, get new tires, and then align that 68...