Don't give anything up! That would be ridiculous because that would mean flexi is having even more negative effects.
You CAN complain about the levels of experience, complain to your managers about the conditions that your crew are suffering, complain that you don't believe it is safe, complain that it increases your workload. Just complain because you are someone they have to listen too. You are an immensely valuable asset, highly qualified and highly trained in a respected position.
Obviously only complain if you care. If you don't... well then don't! Might be your 110k next thou!