My 2011 EB has all the power I could use for the stock suspension. I put a pair of Timbrens on the back, made a difference when hauling heavy and doesn't affect the unloaded ride. Pulled my trailer up the 10700 foot pass in Colorado at the speed limit. It downshifted to 4th just before the top (I run it in 5th when towing, better power and fuel mileage than running 6th).
Trouble.... Yes, have had some. The 2011 models have issues with the timing chains and cam timers. Those went bad at 70K miles, and Ford wouldn't stand behind them. The fix would have been about $3000, but the dealer stepped up and put in some $$$ from a special customer retention fund Ford gives them, and did the rest at cost. My end cost was $900. Only effects the 2011 model year, so your 2013 shouldn't be affected.
Now have 99,750 miles on it. Only other problems were bad spark plug boots which allowed carbon traces down 2 spark plugs. Easy fix. And I ran cheap Sams Club gas in it for a LONG time and the direct injection allowed carbon buildup which resulted in sluggish turbo vane movement at higher RPM's (full throttle). Dealer wanted $3500 to replace one of the turbos. Ford doesn't allow dealers to clean turbos any more, replacement only. I fixed it by switching to CostCo gas, which is top tier and very high detergent, plus a couple of applications of Techron. After a month of that gas and treatment, and running the c**p out of it, the truck began running great. Runs sweet today.