Second dev team ? Are you kidding me ? Would EU need different coded patches then US ?
News flash : programming and deployment are two different pieces of cake.
You don't need that actually. You can deploy patches on US servers first, and deploy it on EU servers later.
And news flash : they already HAVE a team in Dublin, Ireland, which is maintaining the EA servers for EU over there. No extra cost, just phased maintenance. And I am pretty sure they can't deploy patches in EU on remote from the USA.