I count 12 references listed on the front page of the patent, that's not overwhelming. The examiner did not consider the two additional references submitted in

I count 12 references listed on the front page of the patent, that's not overwhelming. The examiner did not consider the two additional references submitted in the 03/28/2016 IDS because they were submitted the day before the patent was published - long after the Examiner's job was completed and with probably too little time to put a printer rush in (to prevent the patent from being issued). Because of the precarious timing, the Examiner did their job correctly, and the filing attorney technically did their job too by submitting the IDS. It's up to a reexamination or contentious proceeding to resolve the patentability issue now. Due to the odd timing, it may be something that the Director (of the USPTO) could sua sponte order a reexam on, which they have the power to do, should they be so inclined.