Most PvE areas feel empty and dead, especially in core Tyria. Daily event completer achievments seem to "revive" these areas for a day, everyone is running around doing events, the game feels populated. The daily puzzle and minidungeon achievments also push you to explore these small areas.
I see here a good oportunity to make the game feel more alive for lvl 80 players, by "reworking" daily achievments:
What this aims to do is rewarding players for repopulating different maps and locations every day, without forcing them to do things they really don't like. Do you dislike vista viewer achievments because they are boring? You can still complete your daily completionist achievment by doing the daily event completer in core Tyria, the Heart of Maguuma and the Crystal Desert. Do you only have access to core Tyria or just like the way events currently are? You can still do it. And you are still rewarded with respective daily achievments, event after finishing the daily completionist.