I don't want to get into a big comparison between games, and full disclosure I don't eve play it anymore, but doesn't GW2 have a system for events where they scale in the moment depending on how many people are around? I don't seem to remember it being an issue there.

On a somewhat related note, do people think FATE grinding the lower level (20-45ish) is practical anymore? When I left the game it was all everyone was doing. Now that I'm back the lower levels are so empty most FATEs just seem to end without participation. Makes levelling a pain.