May 2019
The title says it all. I don't know why community challenges and portal events aren't coordinated with the quests.
For example, when a portal hosts a gnome bomb event, make a quest (10 stars or 20k coins) that awards people for playing 10 games of gnome bomb.
I've never seen an event hosted simultaneously with a relevant award and believe the community would be much more active , if this was implemented.
May 2019
As much as I like that idea, I doubt they will add it to GW2 currently. Hopefully somehow its added into the new game. (If its GW3)