Don't get me wrong it's pretty amazon what it can do but, I get the impression there's no confidence in the answers so I'm not really sure what to do with it. As with a lot of these systems how cherry picked were the answers
I think this is huge issue with many current benchmarks. They need to create some handcrafted secret questions and never disclose them like it has been done with SquAD benchmark.
Second point is proposal how benchmarks can be improved.