Nexus 5X users have been complaining about sluggish performance for quite some time now and it seems that LG has finally listened. The company has just released an update with version MHC19J for the Nexus 5X which improves general performance, alongwith improvements in Bluetooth and WiFi connectivity.
The issues with DND mode have been worked out too and you will also get the March security patch with the new OTA update.
That's all what we can gather from the update logs, but there is no mention of fixing the camera sluggishness which was ruining a perfectly good camera experience in the Nexus 5X, which we also commented on in our review. You can have a look at our video review for reference.
Source: Reddit