The clutch doesnt have to be worn to slip. Its the springs on the cover plate losing their strength more than wear on the clutch plate. A high bite usually indicates a worn clutch plate, but if the cover is strong it wont slip.
As others have said, the torque delivery is what puts a strain on the clutch, not necessarily the fact that its mapped.
My GTI slipped on Stage 1 straight away although when put back to standard it was fine