I don't know if this is something that would ever be considered but it would be nice to have the previous channel you were watching automatically run whenever you started the Channels app.
I know it's a really small thing but that's the only thing the wife and I miss about a cable box. When you turned it on, the last channel you had the cable box tuned to would already be playing.
This would make the experience even more seamless instead of the few seconds of silence you have while you search for and launch a channel when you first start Channels.
Again no super important but I figured I'd mention it