A lot of modern cars are "bottom feeders" and don't need a front grill opening at all. For Ford, the Aston Martin grill styling is cosmetic and my guess is that the blocked honeycomb is for aerodynamic reasons. Its a lot more aerodynamic to keep the air flowing outside the car than through the engine compartment. Racers tape up grill openings all the time, balancing aerodynamics with engine temps. The intercooler isn't blocked so we always get maximum charge cooling but the engine cooling system is thermostatic and it gets enough air to keep the temperature in the target range even during summer.