i wouldn't say it's a waste. it depends on how you like to drive. i have both bars. i don't have any understeer problems. it doesn't push into corners, but if traction does break, i think the front would go first. it's really, really hard to break traction in my car, though, so i would have to purposely do it to find out.

there was a guy a little while back from the altered4 crew who had an s/t rear bar and a stock front, then wanted to know if the front s/t bar would be any improvement for autocross. he bought the front bar and said it was completely neutral afterwards, and liked it.