The orca should have been removed a long time ago, as should've the justice wagon (Which it did) The orca shouldnt have been some fucking flying tank that was impossible to take down without a 7.62, was simply unfair for cops. (Fine for rebels, of course, but thats not the only faction in this game) and nothing more than a pain for those fighting it.
The orca now is fine, if you want to have more armor, sacrifice your mobility and get an Ifrit. That should be the payout here. Be fast, or be armored. Not both.