They arent "treating" anyone unfairly, theyre working their hardest to make sure the content gets to you guys. But if them trying their best still doesnt please you, im not sure what to tell you.
The thing is, this is something they should have known about far far in advance, before ever releasing it to 360.
The condition of the base game is something again, should have been known far far in advance before 11/11/11
Their trying their hardest was typically releasing broken products. People have encountered a good amount of game breaking or just annoying bugs in dawnguard on other systems, and DLC is supposed to be hard to patch if it ever does get a patch.
I don't think they're trying their hardest to please everyone necessarily, but trying their hardest to make deadlines. And I think that's been their problem from the start.
The PS3 copy should have been delayed, and even never announced! Release PC and 360 copies at 11/11/11 if they were ok to play (didn't play them on launch)
Never announce the PS3 copy.
8 months later when it's up to par, put it on the shelves.
As for the DLC? Do the exclusive, but don't put the first DLC out for release until the other 2 system DLC's are going to be roughly ready after the timed exclusive is up.
That, or don't ever give it to the systems and make it clear it's an exclusive DLC and not a timed exclusive.
If things were done like that I think this all woulda turned out fine.