Amongst many other things in the game, I feel Draugr are one of the more wasted potential creatures in-game. If you notice, they can speak, they can fight with tactics, including flee when health drops down to near death. (As much as AI permits anyway) Coupled with this, they also have some form of sentience as http://www.uesp.net/wiki/Lore:Amongst_the_Draugr book shows they could tell when someone had no intention of being a threat (Though it took time since the writer couldn't speak the Dragon Tongue). But does anyone else perhaps wish there was a level or quest where we could speak to or learn something from a Draugr? I'm not saying they should have been some undead society of normal people. But I do think their lore does permit there to be something more to their existence than fighting fodder.

There was a rumor, circulating relatively recently -about a DLC, related to Skyrim's past.

IF this turns out to be correct, I suppose -and hope- we'll learn more about them there.

They're slaves to the Dragons, whose life forces are slowly being ebbed away to maintain the life force of whatever Dragon Priest or Warlord happens to also inhabit the tomb. Even assuming the Dovahkiin could reason with them, there's really nothing to say to each other.

They've only a tenuous connection to life as it is. After thousands of years of being used as living batteries, I doubt there's much higher reasoning going on among them. They've been reduced to animal instinct and cunning. They use tactics, yes but as a society of warriors those tactics are all but instinctual. They have language, but they aren't exactly carrying on conversations - it's generally a phrase or two. They can (somewhat) identify what is and isn't a threat, but as the book points out it took quite awhile for the Draugr to reach that conclusion and even then it seems to be more of a "Leave us alone, we'll leave you alone" kind of deal. And even then, it's spotty what they do and don't consider a threat.

Whenever you need a Draugr to tell you something its 'ghost' comes out and says it instead in that stupid false-spooky voice, e.g. Valdar in Hevnoraak's tomb or the entombed lovers in Ansilvund. I guess that's Bethesda's way around it?