Iirc, Valve pulled Crysis 2, not EA, so I can only imagine that Valve has pulled Dragon Age 2 as part of this pointless war.
I hold my hands up, I'm a huge fan of Steam, but Valve really need to consider their policy on games being allowed on other digital distribution services (which is what I believe Crysis 2 was pulled for). Origin is not a threat to Steam, I looked on Origin recently and Bulletstorm was selling for £60 (no, not $60, £60), Steam was selling it at £15 in a sale and £30 normally. Crysis 2 was £30 on Steam before it was pulled and, until recently, was £35 on Origin. Even Dead Space 2 is cheaper on Steam (excluding Origins current sale on the title).
Steam has enough games to keep me playing until I die, I'd rather skip titles not available on Steam than get them elsewhere for convenience.
Off-topic: D2D was marking items as 'Not available on Steam' recently - a shitty marketing tactic (and also half of the titles marked were available on Steam in some or full capacity) and as a result I wont even buy a Steamworks title from them in future let alone anything else. A tad drastic but money is the only thing these companies understand and I feel a bit better being a dick over it.
Edit: Link to story re Crysis 2 missing from Steam (it's near the bottom);
http://www.escapistmagazine.com/news/view/111041-EA-Gets-Ready-to-Throw-Down-With-Steam-UPDATED