Due to the random nature of the weekly quest of gramps. Sometimes the difficulty difference is from level 1 to level 100 or sometimes the intense can only be accessed by a few and done by a few.
Everytime the gramps become thor 3 (map anyone can access) people party up. Newbies have a chance for leveling up while Old players have something to gain. Players become part of a community instead of doing quests or hunting board quests alone.
My suggestion is that add another level of gramps as normal - hard- intense.
Normal - stays the same
Hard - is where people party up (abbey 3 - Odin 3- Thor 3- Juperos?)
Intense - Quest based end game content
This will hopefully encourage players to stay logged in more (increase pop count) because parties are always being formed therefore more activities for both new and old players. I noticed this whenever gramps quest became something where people gather and party up in thors like in the old days where abbey is packed and full of people. It also stimulates the market for demand of gears for those areas.