Blood still stains when the sheets are washed
Sex don't sleep when the lights are off
Kids are still depressed when you dress them up
And syrup is still syrup in a sippy cup...
I fear that "fire bending didn't come easy to zuko" and "zuko isn't a prodigy" (both true) has somehow snowballed into "zuko is a bad or at best average fire bender".... which simply isn't true, especially by the end of book 3