With all the economy, gearing has tried to get the rpms at cruising speed as low as possible. We tend to get excited when an engine goes over 2,000 rpm. These are small block engines(5.3 and 5.4 are about the size of the old Chevy 327's). We ran the heck out of them. We also had a lot of higher ratio rear ends.
So, don't worry. Unless you have a diesel or and Ecoboost that produces torque and hp in the 2,000 rpm range, use the gearing to get the performance which will involve getting the engine, as it has been said, into the upper rpm ranges.
The days of the big block torque monster engines I'm afraid are gone.