This is something that I find really boring, I just want go from point A to point B.
But to arrive at point B, I need to pass for 400 aggressive monsters … Guild Wars 2 is a game proved without a boring grind, and therefore we DO NOT need to kill 400 monsters!
I think it would be so nice for the players, that amount of monsters in place was based on the number of players hunting in that area. If there is only a player hunting, the number of monsters is reduced, with more players, the number of spawns is incremented.
This does not affect the dynamic events, and would still be more enjoyable when I standing chatting with my friends from my guild.