I believe it is somebody in Groundops Control or whatever they call it in Dublin who updates the website.
No, like any company their size they have dedicated IT and web employees. A website that big and extensive is not something that one of the ground crew would put together during his spare moments.
I would think that not posting full details of serious delays is perfectly normal across the industry. Would you want booking customers to see that? Thousands of flights, one is 8 hours late and you risk losing hundreds of customers? Most other airlines would put something like "contact the airline" instead and most of their PAX know that delays are common and really don't think too much of it. Ryanair, however, has started a myth of almost total perfection that they are trying desperately to maintain.
Hardly their greatest sin, all things considered, though for those of us who have little time for MOL's antics it just raises another red flag to the bull.