First of all, if you're getting screwed over by the insurance company, you need a new insurance company.
How do you know what his CV is worth?
Second, most of these pushbars require cutting the front bumper, regardless if crown vic or not.
Third, if you get into a more serious accident, the frame may bend from the bar, causing the car to be totaled instead of just swapping front end parts.
"May"
If you can't stop hitting deer, get better headlamps, some HID projector retrofits to help you see the sides of the road better, or just plain drive slower in deer prone areas.
I suspect you have never lived in a deer infested area. I am in Kent County, Michigan, the #1 county for car-deer accidents in the whole state. I do drive slower in rural areas (at night), but that won't help if a deer decides to run into the side of your vehicle, and you never even see it coming.
It's ultimately up to you obviously, but I think looks hideous and irreversible. Not to mention adds another 150 lbs of weight to an already pig of a car.
My 2000 CHP CVPI has the original aluminum push bar on it. It doesn't weigh #150