Word for "ability to hide complexity"
Solution 1:
"Abstraction"
the act of considering something as a general quality or characteristic, apart from concrete realities, specific objects, or actual instances.
Solution 2:
You might consider facile:
facile |ˈfasəl| adjective 1 (esp. of a theory or argument) appearing neat and comprehensive only by ignoring the true complexities of an issue; superficial. [NOAD]
Solution 3:
From http://www.thefreedictionary.com/facade
Facade: An artificial or deceptive front