Usually criminals farm on a hummer when cops are outnumbered even in ARs they pull up killing those 2-3 cops and go which really makes the ARs gameplay sucks too I'm voting positive
Then work together to take it down? Disable it with a hydra and have cops on the ground take care of the rest. Just because you can't work together to counter something doesn't mean it should be nerfed. Even without the hummer they will still kill you 1v8.
want to destroy hummer? Try to use it and use hydra/hunter against it 1 shot will destroy it completely. So we can't shot and max speed 200 so why we will use it? No one will use hummer after your suggest.