I still think you're wrong about them being weak. I have KDWS's and let me tell you, they are a great tire! One of the best I've ever owned. Nice bit of bite in the snow as well. They are Ultra High Performance All Seasons, but still lean more to the performance end. They stick like you wouldn't believe. My only major gripe so far is treadwear.

You can't go wrong performance wise with either the KDW's or KDWS's.

 

You are absolutely correct.

As profiles drop, the tire becomes flatter, presenting a less rounded contact patch. This make controlling camber that much more important. It GREATLY affects handling, and if the suspension isn't designed and tuned for the lower profile, your handling and roadholding could be adversely affected.

Then again, many people (including many people here) are more interested in looking like a show car than handling like a great road car. In the extreme case, people drop 22's on old Chevelles in order to make them look like artist renderings. They don't care if they ride horribly, aren't good in drags, and only work moderately well in the rear, saved by the fact that a live axle undergoes zero camber change in turns (while the front is doing all sorts of nasty things and you understeer off the edge of the skidpad)