What constitutes a 'good presentation'? I think for many looking at E3, it needs to be something spectacular like new hardware. In all the other E3s, critique of the presentations has always been fair from what I can see (save PR misunderstandings), based on subjective feedback. People want to see games, want stuff that excites, and want (classy) spectacle. If a presentation is just a list of 'okay' games, it probably won't excite.
Looking back through replies in this thread, there's no anti-MS sentiment (save maybe one or two posters) and just a disappointment with the titles shown as not being of their tastes. eg. Where's QB? I expect the same from other presentations where tastes/hopes aren't met.
tl;dr - my cynicism is contagious and everyone's becoming jaded.
Quantum break and other games are being shown at Gamescom. They mention the Gamescom lineup at the end of the presentation.