Hope police will keep staying in contact with their radios also when you'll be far from them. Since now there's not a big circle to run off anymore, the mechanics will be necessarily completely different.
Probably the more wanted stars you have, the more time they'll look for you all around. Otherwise it'd be too easy to escape hiding in a sidestreet after you got far enough from them..let them go..bye. This could be ok when you have 1 or 2 stars, but from 3 to 5 even after 5 minutes you have run away, if a random police guy spots you, you should get the stars back.
PS: This time there is also the "noise" factor to influence a lot the "research by foot" parts when you get stuck in a blind alley and they know you are there hidden somewhere! Maybe we can pick up some random object and throw it far to distract them and run when unseen (like in The Last of Us).
Can't wait to check how all this will work!