Extend restricted zone on Oilfield.

Particularly on objective 'C' in co-op. There's this particular, accessible roof that would make for a great (and often death-causing) defensive position especially for gunner thanks to sandbags to deploy on. Pic below.

Trying to defend objectives by being physically restricted to the inside of them gives the attackers a huge advantage since their advance can't be impeded or thwarted in any way.

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Perhaps check out my other post for a suggestion to address issues like this.