I wanted to reply to the survey on my phone, but ended up accidentally tapping 'Send feedback' before i could type anything.  My response would have been (and still is 'Autosave'). :)

Also, loving the Arena stats!  Makes me want go go into dueling again just to score some points! Though its strange in that I can see it fine in the public threads, but it doesn't appear on PMs?  Same goes for Title, Post Count and the Bio plus Status buttons.  Is it something planned for later?