I added around 1" or so to the length of my arm on the tranny. It was enough that I could use the other hole in the boss that's already on the tranny for the clutch cable(basically just use the other hole).
In *my* case lengthening the arm made the issue better. The throw IS longer, but it not only takes less effort on the pedal, but you also end up with a slightly longer engagement point. Now, some of it could have been then I replaced the rubber bushing under the cable retainer with a solid part. It also could have been that the cable was able to adjust more than it was before(but I don't thionk that was the case as I don't remember that happening).
In any case it was WELL worth it for me to do that mod. IT may not be in your case, but I think it's worth a shot!