As I can see there are two groups of visa officer one group working on regular application and they cleared the applications till July 2015 only few are left with interview and bg check and other group is working on straightforward cases they have started from sept 2015 and reached to 14th April 2016 and will continue to approve till 13 th June 2016 as part of reducing back log on fast track and again return back for regular application this will eventually reduce the processing time...just an assumption on observing the trend...there are not many applicants of sep Oct Nov Dec 2015 so hope that all the Jan Feb March 2016 applicant who are left will also get the good news soon..