What's the timescale for the BT version of 2862 V3.9.4 which is on Draytek.com? Has anyone tried it? Is it reliable?

Normally they are released at the same time or shortly thereafter.

However this may change in the current environment, and also I'm sure they will be doing more testing to ensure that the update doesn't have the same issue as with 3.9.3.

Now available on UK website.

For anyone looking to upgrade - this has the same limitation as 3.9.3 when it comes to the AP Management facility, which is being restored in the next release.

So anyone using Central AP Management, continue using 3.9.2 until that next release.

This firmware does add some nice features if you're not using Central AP Management though - the improvements to App QoS mean that it's now quite easy to apply quality of service to Zoom's traffic and more services can be set individually rather than as a large group.