Some excellent points. I must admit I hadn't thought of abandoned cart reporting; that's an excellent suggestion. I think that so many sites are lagging in their ability to categorize products and then to suggestive sell at the checkout. These are related concepts and both are not very effective. Development is needed in identifying customer habits to increase up-selling and cross-selling on many sites. I believe that a new method of grouping items for quick access is needed as well. With the amount of product that is available on the internet, even looking for the simplest of things can be an overly arduous task. By carefully grouping products to appeal to each unique customer as fast as possible, sales would increase and so would site loyalty.
Good points, but there are even more basic ones. I've been to sites that don't even have a Search box and could have used one.
Or sometimes the Search box doesn't work well (try entering "allen wrench" to the Search box on WestMarine.com).