Although Sony's E3 conference pacing was piss-poor, it's hardline focus of its major first party titles wasn't. Sony warned the media/gamers a month or so ahead of time, that their E3 presentation was focusing on such. And more than likely, Sony's other first-party projects are gearing up for PS5. As for "little games or diverse titles," any additional multiplatform and indie titles were covered by Sony (e.g., post conference videos and stage interviews).
You have the entire gaming world's undivided attention and you use that time in that way, though? Why? What's the advantage to that approach over using more of that time to highlight things that may otherwise fly under the radar due to their exposure overlapping with everyone else's content reveals? Baffling.
Ghost of Tsushima was the standout for me as I'm intrigued by the swordplay. And Spiderman seemed to hit the mark. And of course everything looked great. There's a bunch of stuff that I may become more interested in once I see more gameplay. The Death Stranding trailer didn't really move the needle because I still am not sure what I'm looking at. I liked Phantom Pain quite a bit, so I'm certainly interested to see more to see whether that was peak Kojima or if the best is yet to come. And then, like MS, there were sequels, expansions and genre games that were...fine.