As I wrote in the thread of my own creation - I suspect this really is simply a case of the patching server not being located on the URI the files indicate it should be at.
http://na.llnet.bioware.cdn.ea.com does not seem to exists.
I thought that as well, but from the URI - I doubt it's just the host that needs to be changed and likely directories as well.
I tried manually changing the URI in the info files the updater uses, but it didn't seem to work - but those files also aren't just xml or text, so it's likely you'd need to either deserialize them or open them in a proper editor.
I did manage to download the Bloodarmor DLC, stick it in the proper directory and press download on the DLC tab in the game, and it sprung to 100% download.
So I just cannot shake the feeling/theory that this is simply is an issue of a wrong URI in the info files the patcher downloads - and if the case, well ........ then it should have been easily fixed a long time ago.
