Thanks for that. Unfortunately things didn't work out that way for me - I was making use of all the HDMI inputs, and Component, with my PVR hooked up via SCART.
The PVR is left on 24/7 to avoid wear on the drive from constantly spinning up/down, and because the noise itself is very distracting. As such I had to go into the menus every time I wanted to use the PVR to switch it from HDMI to SCART, and doing this did share the same input settings as HDMI 1.
So as long as you are using devices which will auto-switch properly (some devices always send a signal even when they are "off") and actually turn on/off these devices it may not be an issue. In my setup it was, and seems like an oversight on Pioneer's part. Having extra input buttons, or having you press an input button twice to toggle between them would have made things a lot easier.