In GTA IV, fighting the cops was to easy...
Back in the good old GTA days, there was army, huge roadblocks and those thingys that pop your tyres.
In GTA V, they to b ring all this back, along with new elements that will totally revive the game in my opinion. I don't know what to make of tear gas, but dogs, ramming doors, real hunting, etc. would make fighting cops a fun challenge.
It would be awesome if you could escape a 6 star wanted by maybe going out to the country, and hiding in the forests. Stealth kills would be a good factor.