My roommate's Klein has the worst front shifting I've ever experienced. Actually that is not entirely accurate. The shifting is fine, but the force required is not. There is a cable guide directing the the derailleur cable to the bottom pull front derailleur and the cable comes off at a near right angle which causes the problem.
This cable guide is forged into the mid pivot assembly, no possibility to change it. I can think of a couple ways to improve it, just wondering if there is a definitive fix that Klein dealers or users have discovered.