Interesting, I have always thought a micless A10 would be a great option.
That being said the worst recorded show is one that doesn't get taped. I was at a show Tuesday and my power supply failed, so I pulled out the mic cable and use the A10 internal mics. Of course, I go to a lot of indie shows where the bands and the PA aren't great, but I was rather surprised that the A10 captured it pretty well.
I'm thinking of making a cap for my A10 to make it more stealthy, but I usually slide it behind my phone in a neoprin case and security never sees it.