Source: Gamnesia, GoNintendo
Note: Without a doubt, Nintendo's online needs to be better for a multitude of reasons, but...
"4) Nintendo Still Can't Figure Out Online
Whether Nintendo likes it or not, a large contingency enjoy playing online with friends. Unfortunately, the confusing Wii U does little to service this constituency. With no universal friends list, no universal friend chat, Nintendo has dug a deep hole it may not be able to climb out of."