What size tire/wheel do you run? You look to have much more sidewall than I do, and I have to assume that dampens the ride and affects handling with those 1.14' bars. I think
@MRGTX has a larger diameter wheel and perhaps that's the reason it is a bit harsh on the street.
I already get understeer with my 1.08 bars, so I don't even think about putting a stiffer bar on mine. Now I do only have a 235 tire on the front due to my wheel choice and I'm sure that has something to do with it. Since my wheels aren't available with the correct offset/width, I'll likely eventually get them widened to accommodate a 275 on the front. I'm not doing anything to the suspension until I can get a wider wheel up front. Overall, I think my car handles great on the autocross.