Personally, at your age, I'd go back on the 5x5. It's a proven strength and muscle gaining method for many many years.
At 16, the last thing I'd worry about is diet with the exception of getting enough protein.
What will 5% bf loss do for you? When it comes to strength and performance, eating the right food is a good thing. However, fat loss should not be a concern unless you plan on stepping on a bodybuilding stage.
Your diet should revolve around strength and performance and let the chips fall where they may concerning bf %. If you want to lose bf then focus on eating good quality food (not a bodybuilding diet) that increases strength and performance and then get in some low impact walking to help shed the bf without compromising strength and muscle.
Understand tho, this is a very lengthy and time consuming process. Be patient. Make a plan and then make small changes as you go. But give it everything you have before making those changes. Commit to an eating plan and weight training program and ride it til she bucks ya....