I think you're expecting them to be more than what they are. They are a vehicle for making game announcements. Just like older ways of doing so (E3) the announcements are going to vary depending on the type of product. Sometimes a teaser may be enough, other times they may want to focus on a particular mechanic, and so on.
So I don't think the scale here makes particular sense, and I don't really see a need for an overhaul.







