*The 'lowered' ground clearance is a component of the low drag.It affects frontal area,reconfigures the entire belly as a diffuser, alters all the pressure/velocity distributions,cooling system airflow,forward vision/rearward vision,dials in wheel fairing performance,and effective fineness ratio.
*The 'cruise' body inclination of lowest drag would have to be optimized in a wind tunnel or corporate level CFD environment.You couldn't just arbitrarily lower the nose and hope for good results.The body shape is designed only for this particular 'raked' condition.
*You'd lose your SAE Approach/Ramp/Break-over clearances at the nose,tail,and in between the wheels without the active suspension and be tearing off parts of the car every time you drove.
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It's a real issue for us modders.You might study air suspensions that are around and see if anything would lend itself to the Escort suspension.
Tesla and Mercedes-Benz are using active suspension just to get to Cd 0.24-0.22 in a street-able road car.
