If a site needs 20 links to satisfy the structural property, perhaps it needs separate pull-down menus to help organize the links without taking up most of the screen. Closely related to the second goal is the third goal of navigability. Garish carnival-style sites or unclear icons detract from the ability to navigate a site. If the user cannot navigate the site, then regardless of the information available, that site is a failure. Good navigation provides the user with appropriatly universal cues to the information.
Simplicity is the fourth goal of web design.
Make a site too complex and the user will be overwhelmed. As always, the site must be tailored to the sophistication of its users. A forum for web designers can be more complex than a credit card payment application on an ecommerce site. Similarly, a brain-teaser site can use obscure navigation while webmail sites like hotmail must remain very simple. Ideally, as with the previous goals, simplicity of design aids the balance of the site.