Wait, you're saying that chaos champions don't accomplish feats in the materium compared to what Draigo has done in the ether? Okay Draigo is ONE guy who yeah has done some ridiculously bad ass stuff to the chaos gods and the realm.The forces of chaos (not including the 13 black crusades by Abbaddon) have been running trains on the imperium for centuries. Entire sectors subjugated and enslaved to the Gods.Worlds destroyed to the point where sometimes they are not recoverable. In case you forgot,Abbaddon also was indirectly responsible for getting rid of one of the most powerful Eldar Eldrad Ulthran.If he never launched that black crusade,the talismans would have never been an issue,and Slaanesh wouldn't be playing pin the tail on the Eldrad in his domain. One guy wreaking havoc in the realm of Chaos doesn't even compare to what the forces of Chaso have accomplished in Imperial Space over the centuries.Next to him who does the imperium really have that could challenge the Despoiler one on one? If a situation like the Siege of Terra occured on a planet and the forces of the Emperor had a shot at taking down Abbaddon or one of the Chaos Primarchs who would they send? One on one? That's right,unlike the siege of terra we don't have any Emperor or Primarchs who could actually best any of the top guys Chaos has. The only guy I see being able to handle Abbaddon one on one would be the Night Bringer at full power and I'm sure he'd be dying to help out the Imperium.We don't have anyone of ridiculous power levels like Chaos does so no,you don't have to have stories of Abbaddon doing ridiculous things like Draigo because he's already that powerful. Mortarion,Perturabo,Angron, or any of the Daemon Princes are ridiculously powerful. We've got this guy and maybe the Sanguinor (who only really comes when everyone is pretty much on their way to the grave) as other worldly powers from the warp.If you want to talk fair and someone being overpowered it makes absolutely no sense at all the imperium is still standing. With the forces of Chaos and the traitors with all the forces they can bring to bear,the tyranids,Necron/C'Tan,and don't forget the old school threat of the Orks/Eldar/Dark Eldar/and now the Tau it's a wonder it's still around. It makes sense that their should be some kinda bad ass somewhere holding shit back from spiling over.
I'm not talking fair. I'm talking believable. Draigo and all of Matt Ward's new ICs could have a hundred achievements under their belt, a thousand battle honors, etc, but his killing stuff in the Warp - which for reasons previously mentioned should not be possible by any mortal - is simply ridiculous, for the same reason that Calgar being the "spiritual liege" of all Space Marines is ridiculous (admittedly, that comes from a WD interview from Matt Ward, not from the Codex), or that the Blood Angels allying with the 'crons and then leaving them be after the fight against the Tyranids is over is ridiculous, for either side. It breaks my Willing Suspension of Disbelief by attempting to make them seem uber-awesome; literally, I do not believe that Calgar is the spiritual liege of all Space Marines, for example. And for the record, I am pro-Imperium.
It is entirely possible that it was the Daemon Prince M'Kar back-up plan all along. You see Draigo bust the faces of all the other gods, including a possible rival in the Lord of Change M'Kachen (and his city). It could be a bit of manipulating by M'Kar in an attempt to elevate his own position by weakening others.
Or the Dark Gods have a greater scheme taking place in the Mortal realm and do not want Draigo to interfere with it. By imprisoning him in the Warp you prevent him for leading the Grey Knights versus a grand scheme of destruction against the Imperium.
Either is possible, but I don't know if it's within the power of the Chaos Gods to keep Draigo...well, existant, or intact. The Warp is just an entirely different dimension from realspace; it was before the Chaos Gods and it is now.
Even so - and I've said so earlier in the thread - it isn't just the fluff in itself that gets me riled up, but how it is spun. Even for being their own Codex, Matt Ward tends to overhype those armies he's given to write for. And the folks at GW expect me as a reader to just swallow that up?