DC Travel did solve a problem that SE created.

Many years ago now, SE did a "Data Center" split. Many people on Crystal were faced with a choice: leave their friends behind on Crystal for the "raid DC" Aether, or stay on Crystal and struggle with the smaller raid community. Their friends got split apart and if they did not have contact with them any other way, then that was the end of their relationship unless they made an alt (which many people did). They also had to part ways with their FC. This destroyed some people's friend circles or FCs to such a point, that they were sad or quit.

But SE hadn't stopped working to try and solve this problem and now it is solved. If those players return to the game, they can contact the players they lost contact with via DC travel, without being forced into playing an alt they don't care about.

It has just had some downsides to it as well, in the area of high-end content.