I think that it's kind of a personal thing. I didn't notice any difference in the steering when I put the lift kit on my Tri Glide or my Freewheeler. I did notice a better ride. A lot of people do notice a difference in the steering though.
I noticed a difference in the steering with the lift kit. I noticed a bigger difference, however with different bars (I put the Harley Reach bars on). All I can figure out is that they place your hands further away from the pivot point, giving you more leverage....
YMMV
Lon