Board Thread:Moderator News/@comment-26140304-20170304073218/@comment-28555078-20170304233648

tl;dr of my opinion:

+ Pros: Rewards are worthwhile to GR for, it provides more content for those who have nothing else to do, gives an incentive to work with the guild.

- Cons: Consecutive GR back to back is EXTREMELY tiring, matchmaking can be horrendous (my guild fought Skylords...), favors the players with the highly specific units, and it appears that killing boss guardians isn't the optimal way to acquire points.