Let me say a few things about the current situation about GNW packs. I was the leader of a group before i decide to quit (too much work deciding on who should get what and who shouldn't get it) I leave it to the new leader to take care of it now :D
Anyway things i found are bad about GNW packs: 1) Still don't know why u gain less total rewards when you get 1st (9, 3L,4H,2E) than 2nd (10, 2L,4H,2E). Yes you'll get 1 more Legendary but you'll also make one more person unhappy (cuz they'll get no reward). Also because of this limited amount, the leader is "forced" to make a distribution method to make sure the system is fair to everyone and make everyone in the group happy. We're using a spreadsheet to keep track of who got what every week...
2) They should really update the rewards in the packs (i mean the seal scrolls are nice but no one really needs the low refines anymore? maybe upgrade to medium?)
Yes, splitting the group so that everyone can get something every week is good too. BUT it really depends on how active your server is. Let's say in server 1, 500 people are active (random numbers), and there's already like 10+ active groups, there's no point in splitting cuz you won't get anything. But it would be great for let's say "dying servers". But the new group leader need to really make sure his followers would contribute and be active everyday. Cuz your old group would hate you forever (you can't go back to your old group if this fails (very likely). So it really depends. Right now our group has like 12-15 people active in GNW (so it's still manageable), missing 1 week of rewards is still okay.