There is a very good article on 37 Signals about Clarity vs Simplicity.

Jason Fried writes:
"What really matters is clarity. Clarity in visual design. Clarity in copywriting. Clarity in purpose, mission, and statement. Clarity allows someone to "get it" while simplicity only allows someone to "see it."

Clarity - what a neat concept. I definitely agree with the statement above. I usually say that making the complex is simple - simplifying the complex is difficult. Now, making it clear can be both complex and difficult but it is ultimately necessary since it's all about the content.

One of my favorite reference books is "Don't Make Me Think" by Steve Krug. It was relevant when he wrote it in 2000 and it's still relevant today. People don't want to go through hoops to "get" the information they are looking for. Nor do they want to have to unravel the jargon to find the real meaning of your content. Who has time for that?