@ bosschick:
1. Increased shims --> lowered rollcenter on the front --> more steering, less rear grip, slightly more rollangle
2. lowered rollcenter rear --> more rear grip, less front grip(steering)
3 and 4:
Not that easy to answer: While pitching (braking or full acceleration) the rollcenter height of the respective axle moves up or down MORE if the camber link is shorter!
To break it down, as much as possible: With short links the car should understeer more on corner exit and oversteer more while braking!
But shorter links result also in more camber gain. In my opinion the upper effects are bigger (especially balance wise)