What does it turn out like when designers design? It usually contain all the latest fads (Flat design? Custom fonts? Lots of white space everywhere?) It usual

What does it turn out like when designers design? It usually contain all the latest fads (Flat design? Custom fonts? Lots of white space everywhere?) It usually leaves out a lot of functionality that users already expect. You can only have so much functionality given the amount of white space and padding required by modern design! Of course you can iteratively make them produce useful result. Same is true for engineers.