It is already too hard if you noticed. A vapid can't keep up with RS already and the RHL is only like 8 minutes.
The scenario you are talking about would be like this: Someone evades. He gets suspected. The cops looses him and he could've changed his vehicle. You find someone and attempt to pull him over to check if he is the suspect, he evades.
Now you have 2 suspects instead of one. And that is very a common scenario because there is too many reckless drivers over the city.
Yes, the area system might be a little broken. But it is too hard, in T3 people used to evade without that and with a couple of infernus(es) and RS(s) behind their backs.
Now most of the people can't drive and keep up without atleast 2 expert drivers on duty.