The only weak link IMO would be not to add a SCT Hand Held Device w/ a 5* Performance Tow Tune (or any other reputable tuner) on a F150 Ecoboost-period.
This is the best money spent that will increase torque down low; add more horsepower which has definitely increased my mpg's while towing.
Sure adding better truck tires, brakes, shocks, rear swaybar, airbags etc help in the overall towing experience-fact.
Take a look at the diesel truck guys towing TT & 5th Wheels. Most that I've encountered at campgrounds do not have stock trucks, they've added some aftermarket performance goodies.
If your not comfortable with a 1/2 ton, get a diesel....no shame in that.
I just got back from towing from AZ to San Diego and back....truck is extremely stable and capable returning decent gas mileage with an average of 8-9.4mpg's going out on a 91perf tow tune and 10.1-11mpg's coming back on a 87 perf tow tune by 5*.
