Valve has had plenty of games that have had DLC only through GFWL or through the publisher directly. Fallout 3 is one example, Mass Effect 2 is another. Not to mention that other games have had multi-DD launches, multi-DD exclusives and it didn't matter to VALVe either. How many games have been pulled from Steam for this reason?
So at this point you're just throwing poo on the wall b/c you seem to have no idea why the game was pulled but you'd like to blame Steam all the same.
Right now I'm viewing this as 55/45 EA's fault if only b/c the vast number of games that Valve has on Steam & the zero games that have been removed before this incident. Once we know more then we can lay blame but its pointless to draw complex conclusions from the little info we all have.
If you would have been keeping up with the conversation, you would see why we think it is DLC related. Check a few pages back. Dont just jump in with some conclusion you drew from 1 post.