Besides not liking the space/weight saver spares to drive on, when needed, (even for a very short distance), and not trusting the plug kit/compressor setup for all scenarios, I am afraid to remove any more weight from the back of this car, since behind the front seats is already 'gutted', save for the plastic side/hatch trim, and the jack and spare.
The weight distribution is probably already at 70/30 or so, LOL, don't want it any more unbalanced.