I got my hands today on the latest BlackBerry 10 OS which is 10.3.1.1151 and installed it on my BlackBerry Passport. First thing noticed: Instagram works not perfectly with the Android version. No more crashes.
Another thing is that the Password keeper can now be synced with the cloud. As well the Camera feels quicker as well which is great too. I found it often too slow.
Picture password seems a little more responsive too now. Before it sometimes stuck.
So far this is the smoothest OS I had on a BB10 device. There might be more news , but I did not find them yet…
You can download the non destructive update from MEGA here (LINK) and install it via Sachesi. If you do not understand what this means keep your fingers off the update.