Can someone please tell me what was in the last ES:O update? I got it about 12 hours ago, give or take.

And more specifically, why I had to download over 200MB of data because of a patch? Is this normal with Android apps in general?

My guess is, the game automatically downloads the expansions. Of course, you have to pay to unlock them. So, that 200 MB you downloaded was likely the new Ithaqua expansion.

That is unlikely, because I own the expansion already. Both of them, in fact. I've purchased (and played) it about a week or two ago and the last update was yesterday.