It's like giving away a car for buying a TV... If I did really fancy force kills to officers all the time then people would purposefully start f**king up in hopes of seeing more cool force kills. With the simple choke it's to the point and effective... want to see some cool force kills stormtroopers? Well you had better bring me some rebels... want me to go out of my way, single handedly capture a wookie for me.
That's how you get results you can take to the bank.