Really?
Go to the page. Open the first menu, "Products". They've grouped Windows stuff together and Office stuff together. On the next column, there is everything from Surface (which one?) to Hotmail. On the column after that, we have products like "Partner network" and "Microsoft in the enterprise". This column also has "Cloud services", but Azure is in the final column.
Let's try another menu, "Security". There are only four options on this menu. Let's assume I'm someone who doesn't know what every Microsoft brand means, but my friend told me I might have a virus on my Windows PC. Does that menu give me the slightest guidance about which option I need? The names are completely meaningless, unless you happen to know that Microsoft Security Essentials isn't actually a guide to the essentials of security, it's the product with anti-virus functionality.
Which use cases exactly are you imagining are not supported by this "vast array of disorganised links"?
I know what I want to do, but I don't know the name of the Microsoft product or service that will help me.
I know what I want to do, but I don't know whether Microsoft offer a product or service that can help me.
In fact, just about anything except "Tell me about Windows", "Tell me about Office", or "I already know exactly which product or service I want, by Microsoft Randomised Brand Name(TM), tell me about the thing I've already found".
There is no sense of priority. No sense of leading a visitor interested in a particular area through what Microsoft has to offer. It's just a catalogue, with a lot of spurious entries thrown in and no descriptions for anything. It is empty.