I'm a bit late with this, as the latest data (up to September 30th) was released last week. To make up, here's Andy Lee Robinson's latest video showing the PIOMAS sea ice volume minimum long-term trend:
Sea ice volume stays relatively stable during September, with some years going up a bit, others still going down a bit. 2015 had a very small uptick of just 57 km3, similar to 2012's increase of 35 km3, so no changes there, this year still has 2000 km3 more ice than the 2012 record smasher. But with 2013 going up by 169 km3, the gap has become so small (289 km3) that this year is almost on a par with the first rebound year. And it's still 1087 km3 below last year's further rebound.
These differences are more visible on Wipneus' PIOMAS volume graph:
With 2015 ending as 5th on record, the trend hasn't gone back to the drastic decline of the 2007-2012 period, but neither has it confirmed any suspicions of recovery. It is simply continuing the downward linear trend, as can be seen on the PIOMAS sea ice volume anomaly graph:
As far as average thickness goes (a crude metric, derived by dividing PIOMAS volume numbers with Cryosphere Today sea ice area numbers), the trend line is hovering right in the middle of all trend lines:
With extent and area shooting up ever since the minimum, average thickness may stay in this position (lots of thin ice coming into existence at the fringes), unless it is accompanied by a similar spurt in volume.
After the 2012 record melting season winters were such that the 2013 and 2014 melting seasons started out with a similar amount of ice volume as 2011 and 2012 (the number 2 and 1 volume minimum record holders, so to say). However, after last year's cold melting season led to an even further rebound from the 2012 record, this year started out with significantly more sea ice volume. With a relatively cold start to the melting season, it seemed there would follow yet another rebound year, but a very warm July (see this overview) turned the tables.
We now have to wait and see what winter brings for the Arctic. With the Pacific releasing large amounts of stored heat, the globe is facing yet another record temperature year. A part of this heat will eventually end up in the Arctic, but we can't be sure what the short-term effects will be for the ice pack, as there doesn't seem to be a direct link between ENSO and Arctic weather conditions.
Either way, the prelude to next year's melting season has started. It's difficult to make out what happens in these darker months, but we'll observe, analyse and speculate nonetheless.