While on paper idea might sound interesting, in-game is a whole different scenario. With the desync the server has, most likely that will make people above 100 ping impossible to arrest if they want to attempt an arrest without lowering their health, and again, lowering the health of a criminal that has over 100 ping is not easy task, since a lot of times shots don't register and you'll end dead while trying to get him low in order to arrest.
Not to mention, it will incentive cops to kill more criminals than they actually try to arrest. The only reason you see a cop being able to arrest 6 guys in a row in a SR is most likely because there were a lot of guys standing still without being aware of what was happening, or them just landing a shamal on top of a lot of criminals and then swinging their nightstick, but that's almost their whole strategy when it comes to SRs. Without them being able to get a lot of guys after landing with their shamal or any other airplane on top of the SR, it will turn into an all-out shoot-out between crims and cops which at the end really doesn't help in the idea of teamwork, since a single guy can snipe down a lot of guys while being alone in the furthest corner of the map.
While I do think the arrest system need a rework since the player base has become way better at the game than they used to be and tools like taser make a 1 v 1 scenario impossible to win against a cop (unless you have serious lag issues), I really doubt this would do the trick.
However, fun suggestion 
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