AFAIK, the anti lift kit is just a set of uprated castor bushes that add an extra 5 degrees of castor angle. You can usually slightly adjust the castor angle which will affect the handling, but won't change the feeling of the bumps.
Actually, I'm surprised with just the ALK fitted you get a noticeably harder ride. You should get better steering feel, but I wouldn't expect much else. May just be that you can feel the bumps through the steering more or even just that the pot holes got bigger with the snow/ice!