I can only speak of the Gallente mining campaign.
Perhaps 4 hours of play, mixing 3 moissanite fleets between epic arc missions, is putting me over 18% done since launch of Cradle on Tuesday, and that is with two of the moissanite fields spawning in lawless insurgencies. We have a long time to go. Maybe after the initial surge, interest will wane. If I can reach the goal, it will take me a couple weeks casual play, since the respawn timer negates the possibility of racing. As players start hitting that limit, perhaps the Global Progress will slow down. However, I am surprised by the activity, I have fleeted with hundreds of players now. If you miss a field, it’s not a major blow to individual progress, seems like 2-4% each site.
I think the rewards are not particularly good. The cost of the crystal exchange is very steep. Those are the things I would change first.