The OPP doesn't get at least a few 4x4 Tahoes? It still uses P-metric tires, so winter tires are available - put those two together and you have a great cruiser for bad winter conditions. I'm not saying the OPP should try to pull cars out of ditches, but outside of a city, there are just some roads where a 4x2 can't go. (And I've been stuck in one!)
Aside from the wear and tear on the Impalas, do they have a bad turning radius as well? I drove a Town Car before and found the turning radius incredible for U-turns - I'm guessing it is mostly because there is no CV joint up front to limit how much the wheels can turn.
Do you know if any of the other "police package" vehicles offer ballistic door panels? Does the OPP even order the Crown Vics with that?