That you want "not to hide important information and high performance features" does not imply the interface has to be poorly designed. A well designed interface can accomplish both.

Most interfaces "designed for experts" are poorly designed crap --and make the work of the "experts" needlessly hard. That some swear by them is mostly "Stockholm Syndrome" (or it gives them a false sense of accomplishment to use something so badly designed, er, I mean "designed for experts".