Guild Wars 2

The story in GW1 had common goals for all players. They NEEDED to do the same missions. If they did them with friends, their friends were seen in the cut scenes.
In GW2, the story totally separates players. There are no specific places where players can gather and do the same mission because they NEED to do it.
Of course the personal missions are similar to the missions in GW1, but the lack of specific outposts to gather in begins to hit very hard in the community unity.
Add common goals for players, other than hearts and dynamic events or dungeons. Form all these 3 I mentioned, only the dungeons have a specific spot people can gather, the rest are not so visible due to the non grouping requirement

What’s the problem you’re trying to fix here?

If your looking for a common goal between players, play some WvW. If your talking about a common goal between players for your personal story, the word “personal” comes into play.