Not having the rear end kick out isn't necessarily a bad thing. My car can kick out the rear end on command
But sometimes it does it not on command too
Especially when i have lots of stuff (or more than usual) in the trunk, it then likes to kick out much easier, many times by suprise! (especially to the passengers
)
I've also read really good things about the bending of the rear beam. A couple people in California have done it (well, two to my knowledge) and the one who has had track time since, really likes the results.