Quick Arena will not pair up players into games again. I know this has been an ongoing problem for well over a year but I'm just bringing it to your attention.
Also, as someone else noted months ago, the site actually has a strange glitch when the Quick Arena feature IS working properly.....
When you select the option of Quick Arena, it will go into the mode of searching for an opponent. The glitch is that if you change your mind and attempt to cancel the search for the quick game, it won't actually execute that command and will continue searching for an opponent to pair you up with.
When the Quick Arena option is down (not working), then ironically, it will allow you to cancel your search for an opponent.
Really surprised that you all haven't discovered what causes this annoying and rather frequent problem.