I don't think it was a bug that got the game delayed.
More like it's to help the sales of necrovision expansion AND SW3. By separating the two in to different release dates increases the chance to sell more of each.
They are a totally different genres of course(and quite cheap for 25 euros IMO),but who knows what business execs actually think...no one cares what we want and when,it's all about profit.
Just look at Ubisoft and the crappy new DRM to see what I'm talking about.
With all said,I'm still hyped for SW3 and glad 1C releases it at all.

At least we get Necrovision to keep us happy during the weekend(even though I would have preferred SW).
I got lots of other games to finish and Front mission 5 too,so...