Yes they are, but I think they jsut have one person that watches this website and rarely comments anything particularly useful. The X1S is due for release early next year and a firmware update for the U2 was just released a short while ago. I think they are just a tiny branch of a still quite small company so nothing happens particularly quickly.

Most Onkyo receivers use the same IR commands and have done for many years now, try some similar models from around the same year and you will find codes that work, failing that, use the IR learning to copy the commands from the stock remote.

I had no issue controlling a Shield via Bluetooth, however the best functionality comes from using a FLIRC customisable IR receiver, that allows you to map any command to any function or keypress on the receiver, including every key on a keyboard for proper control over apps like kodi, and custom shift/control macros in the receiver for mapping custom functions in android to launch apps etc. All the remote needs to do then is spit out any IR command and the flirc can map it to any complex function.