It is not only an incredible drain on troops and resources but even diamonds, lol. Spending over 100 goods in one unsuccessful negotiation creates a very strong incentive to spend 10 diamonds on extra turn.
I bought diamonds twice for this thing, which is something i never ever do on Beta.
Inno - may I have an additional 1000 free diamonds, please?
I do not know what the total stats for all GBG players are but I think GBG is a major drain on troops and resources for many. So to make this system somehow sustainable in a longer run, BGB rewards may need to give back troops and resources instead of fp. Simply to allow a player to at least partially replenish inventories and maintain GBG activity.
GE already gives back some troops and goods rewards. I think something like this will be needed for GBG...
If I could get back 30% of what I spent in GBG, I could probably continue at current levels (daily attrition around 50) indefinitely.
Moreover, since it is a PvP feature, it would make some logical sense to me if my neighbors were recruited from guilds I compete against in GBG.
And the last thing - PvP rewards (medals) need to be revisited. Upgrading them (drastically) could be one of much needed mechanisms to create individual rewards for putting extra effort into FBG. Since GBG are designed to help largest guilds to maintain their top ranks, the only way to incentivize medium-small guild members to do anything in GBG at all will have to be through individual rewards.