Personally I found the English article to be quite lacking. I'm not sure you get a good understanding of how exactly Bitcoin actually work from reading it. It also contains a lot of repetitions. I also think the article needs to push the economic aspects a bit more and be a bit more self-critical. Right now it's mostly about the tech, which is, to most people, rather uninteresting.
Yes. I didn't expect the translation bounty to take off so quickly. So that these kind of things could be pointed out. We should improve the English article and, probably, start a bounty here for funding a bounty on Wikipedia's Reward Board. That would get some experienced Wikipedians to work on it.