This topic actually goes a little deeper than just longer clubs vs shorter clubs. longer clubs need to be categorized as shots off the turf, or on a tee, such as the driver.
Don't be fooled by feet alignment. Many of the best golfers in the world have the right foot pulled back, or have slightly closed hips at setup. It helps assist the turning component in the backswing and swinging enough to the right, especially for a driver if the golfer is choosing to hit UP on it...
That is also an important question... is the golfer not hitting it far enough, and hitting up will optimize the numbers??? well then there needs to be changes to the mechanics of the swing to still swing out enough.
Dana Dahlquist did a brilliant video of Robert Rock, and went over some very important address pieces, such as the amount on ankle, knee and hip flexion.
It's also important to remember, that sometimes, "uncomfortable" isn't a bad thing, its just that you're not used to it...
The distance away from the ball becomes important in dictating what type of shot you're looking to hit. Further away for push and draw swings, as it has the arms hang more outward and raises the handle... closer to the ball has the arms more downward and lowers the handle, helping shift the swing more leftward.
In an ideal world,I believe we would flight the short clubs lower, and long clubs higher, but lets be realistic, we dont have time , money, or energy to learn exactly how to do all of these, though there are simple ways to do all of it. But i strongly believe Driver adjustments are necessary if you're looking to optimize launch monitor numbers.