Ubisoft was a good conference, mostly games, even if they didn't outright interest me they all look solid and had good presentation. Even the exercise game looked really good. Rainbow Six was the highlight of the show, but the show as mostly about recapping and game updates.
EA was really odd and had wierd pacing. Was disappointed because I thought it would be the most entertaining show, but it was pretty dry on content. Mass Effect 4 had essentially nothing except "It's going to be awesome!!!11!", and the new IP even less. Battlefront was really disappointing too, no gameplay. All of these games look like they're target 2016 at the earliest. 2015 looking like a dry year for non EA Sports games. They probably would have saved money not doing E3 at all. Hardline was pretty awesome but you could have presented it at Sony or MS and had the same effect.
MS however, was definitely excellent. A good combination of indies, sequels, new IP, 2014 lineup, and 2015 games. I don't think they could have done anything different. People set their E3 expecations to unrealistic heights, you won't see many big exclusives like how FF use to be, that just isn't how the industry works anymore. They also cut out the PR speak, notably "cloud computing". I think whoever organized this E3 (if it was Spencer), obviously knows their audience better than the last director.
Can't wait to see Sony, undoubtedly going to be some Arkham Knight, MK10, Project Beast and those three alone make it better than Ubi and EA's conference.