I fully support open world group content, but from earlier previews and it's initial launch, I think they intended it to work similar to the Fate system, where everyone could jump in and reap the rewards. A and S rank marks were meant for more than one or 2 people, though. With whole servers doing this that logic kinda went out the window for the time being, so SE has been forced to improvise by making groups all but required. Players who are in queue for dungeons/raids/Frontlines, etc. have been forced to choose, which is where things went wrong, as it was not meant to be this way originally. It's not that people don't want to group up and hunt, there's just so many people doing it at the moment and there's a lot of other content for them to complete. The Hunt was meant to be a side activity, not a full blown server event. The rewards are ridiculously high though, in my opinion, hence the mass numbers of players. If they would up the daily mark rewards I'm sure at least some of the complaints would die down.