Dingbatt: Have you had a chance to check out the IR blaster? Is there any device support for it?
The config for my Samsung tv (3 years old) took more or less a single step.
Once I selected the manufacturer, there is no need to select the actual model, it simply said "point it at tv and press the turn-on button". The TV came on, i confirmed it on the device and that was it.
I've had no such luck with my Yamaha AV system. The system is quite old and Yamaha doesn't appear on the list of manufacturers so you have to go through "confirm power, ch+, ch-, 1, 2, ..." buttons.
The actual application is more than just a remote. It allows you to download the TV guide and set your favourite channels and shows. This will then automatically wake your phone and tune the TV into appropriate channel.
It doesn't work for NZ though, at least on my version of the One. The country list includes AUS but not NZ.
The app is capable of fully replacing your standard remote controller but I didn't get far enough to know if it does macros for multi-device setup.