Overall I liked the official presentation showing, but I do have two fairly large complaints. One isn't actually related to DA:I though.
First complaint, the resolution of the video, even at 1080p is fairly poor, Compression or upload issues? Very pixelated and somewhat irritating.
Second, and by far the more serious complaint, Iron Bull's AI seems to be pretty bad. I don't know if it's just a melee pathfinding thing, but he can't seem to find a way to get in and attack the Dragon, and occasionally he just kind of sits around doing nothing on other battles. This is fairly consistent with what I saw in other E3 snippets, official and unofficial.
Now for some praise to mitigate that.
First off, Mage gameplay looks fantastic, So many games are content to let mage be the Microsoft Excel of gameplay. Pick spell, cast spell. The combination of Magic Combos, great VFX and embellishing animations make Mage gameplay look extremely enticing.
Second, the Hit-boxes, particularly on the Dragon are quite tight and precise. With even a small gap resulting in a total whiff by Iron Bulls Greataxe, conversely, another swing catches a piece of the dragon at the very end of the arc resulting in a contact. This coming off Skyrim's dragon Hitbox where you basically have an entire cell of blank space which you can swing at and still make contact.
"Wedge up somethin' fierce."
Impressive NPC count in Redcliffe. Additionally, battles happen on the road which the Inquisitor casually strolls by, to busy lookin snazzy to give even a single f**k. The NPCs are content to murder each other as long as the Inquisitor doesn't get any closer.
Running animations. While I'm sure most people don't consider this a big deal, remembering Dragon Age: Origins running animation, that had everyone moving as if they were fatally constipated when weapons were drawn made me reflect on how much better DA:I's movement animations are.