It's not that much lower. It's just longer in the front and the side skirts are lower in the back. This will only effect you when pulling into sloped driveways and going over speed bumps. Always take them at an angle.
Side skirt width for various body kits.
I would also recommend getting some kind of a shield/splitter mad for the front and maybe even under the skirts to protect from scraping.
Amuse Front Bumper Aluminum Skid Plate / Splitter!