To get a bit technical, a shorter shaft will get stiffer, but more so if the tip is cut and less so if the butt is cut. (Tip is by the head and butt is by the grip) Basically, cutting it at the tip increases the average diameter of the shaft and cutting it at the butt reduces the average diameter. That may sound like the latter should soften the shaft, but there's a point at which the diameter versus length equation can go either direction.
Take a yardstick and hold it on each end. Bend it a little and feel how easy it is. Then hold it on one end, but a foot or so towards the middle. You'll feel a difference. It's a loose analogy, but I think you'll get the principle.
As for the lie, it depends how tall you are, your personal way of setting up to the ball and which way the clubs were initially bent. For the first time in my life, I'm playing clubs bent upright to fit my tall body. It's made a very noticible difference in how the ball reacts.
If you decide to buy the clubs, how would you feel about having the lies adjusted first and simply choking down an inch or so? It would save a little money for the moment and then, when you need new grips, you could adjust the lengths.