I think you guys need some serious driving practice. I haven't driven a clutch yet I couldn't get the hang of within half an hour.
I my own cars I've had standard, nismo single, heaving duty exedy single, OS twin (solid centre) OS tripple (solid centre) and quickly adapted to all of them. I've also driven tilton twin, carbon single, and various twins, singles and tripples.
with my OS tripple I never stall it, can do hill starts no problem. even with a small 'take up zone' all you need is a small amount of clutch control to drive it easily. so practice up.