In addition to the points on the list, you need to take context into account too. A large successful company has built up a lot more trust than your one might h

In addition to the points on the list, you need to take context into account too. A large successful company has built up a lot more trust than your one might have, and can get away with design decisions that are less than optimal because everyone knows who they are and takes them seriously. It's why eCommerce sites can't just get away with cloning Amazon's layout. Because while it 'works' for them, it works in part because people are willing to forgive certain bad design decisions and performance issues due to brand recognition. They likely won't be as forgiving towards your site. It's also worth noting that if it's too obvious that you copied someone else's design, people are likely to distrust you because of it. Especially if they've stumbled across the page/site that inspired you before.