Hi Cags, I can see your points and would have the following comments.
Exit Settings - I personally find the Exit button more intuitive than pushing the same button again but that is purely personal preference. I would be happy with either option.
LED Noise gate - I think that would need hardware update to ad the physical LEDS
Input A/B - yes I agree the ability to switch inputs with a quick button would be great. At the moment you can save most of the information from the Input menu in an input preset but this doesn't include the input source. I we could just have the ability to save the input source as part of the preset it would open up all the possibilities I think you need (especially if you could apply presets at the Performance level rather than Global or Rig level). For example, you could save an Input preset for Guitar 1 and a different preset for Guitar 2 etc. Then simply create a performance with a range of rigs that you use for Guitar 1 and a second performance for Guitar 2. It could be a duplicate of the same performance except for the input preset setting (which would be applied to all rigs in that performance). Change guitar and simply bank up/down to the appropriate performance.
I would also like the ability to use both inputs simultaneously. I use a PRS P22 some of the time. This has both magnetic pickups and a Piezo for acoustic sounds. It would be great to be able to simply connect each signal path to a different input and send the mags through the full amp stack but send the piezo through a parallel path that bypasses the amp but has access to some FX. I currently can work around this using the FX loop and parallel path but it is a bit of a fudge.
Selective mute - can you not achieve this with output presets already? I have to confess I don't really use the output presets much but did experiment with them at first. The big drawback with the current output presets is the fact that you can't store volume levels which I think is a major flaw. However, it isn't an accident. Burkhard has said in previous posts that this was done deliberately to avoid people accidentally switching to an excessively loud preset and doing damage to the receiving device/speaker. I can see the point but still think the ability to save volumes as part of presets would be a better all round solution.