You guys are ridiculous. I get not enjoying it or not enjoying it as much as you hoped or expected but these "it was too quick" or "inorganic" excuses are silly. These are grown men on a professional wrestling show, not a three hour superhero movie where Ben Affleck takes a break from groping to get a group of reluctant heroes together.
And it wasn't even that quick. Not only were they broken apart for three years but they have all been faces on the same brand for months. People were complaining about the length of time it took just for Rollins and Ambrose to tag together. I'm not sure what people expected. Did you want them to all feud together, fight in another triple threat and then all start kissing mid match? Should The Miz have kidnapped Angle's kids and spend weeks trying to find someone, no some group to get them back? Did you want Ambrose to have a long battle with prostate cancer only for The Shield to reunite and show that only the power of walking through crowd and wearing riot gear could defeat the Big C?
This is professional wrestling, not everything can be drawn out like the overwhelming success of finding out who the leader of Aces and Eights was <sarcasm>. Or the Higher Power <more sarcasm>. It would not be true to Reign's character to have long dragged out character development, dialogue, or indecision for them to finally get back together. The reunion was fine, what will deem this a success or not are the matches, or match.