It surprises me that people want more hearing, a sense we already have several octaves of range in, versus wanting better vision. Our vision is just about a single octave; extending it to the range of our hearing (about 10 octaves) and we'd be seeing from the ultraviolet down to the middle microwave. Shift our vision down some +3 and -7 octaves around what we see now, and we'd be seeing wifi noise and microwave ovens.
And since most of our clothing is designed to not block infrared heat from leaving, with that you would have comic book vision!
Relatively speaking, there is not much to see outside of 400-700 nm. There is a lot more to hear outside of 20Hz - 20kHz. The question is if you want to hear it. If you are dedicated to maximizing your pasty-white-nerd cred, you don't really need either sense expanded. If you head out into nature, increased range of sound will serve you better. I would like to hear a waterfall or crashing waves with wider range, for example. - Clearly higher acuity of any sense would be useful in more situations. - As for sense of direction or lie detecting, those are more a function of paying attention to detail. Anyone can develop those if it means that much to them. I'm not convinced that I would like detecting every lie.
"The education system isn't flawed"
Yes it is. At least from my POV. Some other slasher beat me to the punch - See http://www.johntaylorgatto.com/ for a history of where we went wrong. The Prussian government designed the education system we use to prevent the proletariat from revolting (double entendre intended). If you take the POV of the American elite/aristocrats, then our education system is working perfectly well.
"As I learned in school, the first thing you do with a class is level their knowledge." - a young friend of mine with a BA in secondary education (name withheld to protect the young and ignorant)
The word you're looking for is kakistocracy. http://www.answers.com/topic/kakistocracy
The nail that sticks out will get hit. (deru kugi wa utareru) - Japanese proverb