If they randomly cut to what he had as the prologue then you have to ask what the point was of the scene. You get random background exposition on a conflict that isn't really central to the plot. You get introduced to characters that will all die. You don't see the Breach. So what does it offer you?
For the part I snipped, fair enough.
If you're asking me personally, then actually talking to some of those doomed NPCs would have given me more of a sense of personal motivation. BioWare can be excellent at making even smaller NPCs have a lot of character, so that would have been the time to break some of them out. It would have also given the player a chance to get to know what's going on in general. If they are going to start the game with the Conclave in any fashion, then I don't see how getting a feel for events is wasted.
This would have been a great time to drop little hints about the past. I mean, a lot happened in between games and it seemed like the devs had expected everyone to have read the EU. That's silly. For instance, I think that Wynne's death should have been mentioned in the game in some fashion. Leliana was a friend and you'd figure she'd brought it up. A Conclave prologue would have helped. I mean, something like this:
1) "Did you hear about the White Spire mages?"
2) "I heard Lord Seeker Lambert was murdered. No one knows who it was."
3) "I heard about a new source of lyrium in Fereldan."
4) "The templars in Kirkwall have gone mad" (This did happen, according to Vicount[ess] Hawke.)
5) "Wynne was yet another causality in this war."
Or how about little things to flesh out the character. Maybe talk to other representatives of Dalish clans for an elven PC, for instance. How about having a dwarven PC talking to one of his/her friends about just surface life in general. That would have been a great time to develop small details like whether or not a dwarf had been born a surfacer or they had come up with the rest of the Carta to the surface after the Warden cleaned house. I wouldn't mind this for all races.
This is just my opinion and I don't think BioWare did a bad job with their prologue. I'm just stating the ideas I wouldn't mind for future games. I know my idea would have added a lot more cost and development time to implement. Something like this for later would be nice though, when they aren't focusing on 5 platforms and customizing an entire engine. 