No experience from outside crew during crew battles.
I've noticed that during crew battles, some crews will hold massive 'bring your own bomb' parties to invite large number of people from outside their crew into the battle by giving the crew members in the battle experience when they pickup the bomb items they dropped.
While this can be done also by the opposing crew, I feel this damages the idea of direct competition between the two crews with an imbalance from the outside help.
If it could be coded to prevent any experience gain by crew members of a battle from outside crew members during bomb drops, I feel this would return the balance to direct competition between crews.

An all-new crew battles/war system will be released in the next update to the game.
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GreyFalcon commented
Additionally, say you get a 4 vs. 4 battle and 1 has a couple members with very deep pockets. Now it completely unbalances the competition of crew vs. crew because the one with deep pockets gets a whole server to fight against the 4 who would have only been able to compete directly making it again, unfair.
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GreyFalcon commented
But the idea is crew vs. crew not crew vs. the server.
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oBADWOLFo commented
I don't mind this I think this is a part of the battle tactics and if anything the idea of teams with 4 against 8 as you put in the comments, could infact help more so the team with only 4 as if you were limited to only dropping within crew you would have less people to drop and less cp to spend, opening it up in this tactical way is a good thing.
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GreyFalcon commented
Though lana, if you have 1 side with 4 members and the other side with 8 members, the amount of experience the 8 member side would get in comparison would be crushing compared to the amount the 4 member could get. Again, an imbalance to what is suppose to be crew verses crew by an outside group.
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cimbakahn commented
I feel that things are still even because of the fact that anyone can do this in the game. Both sides can do it.