After you do a complete, thorough, and correct bleed, pump the lever a few times with the system closed. Then (keeping the lever end closed) open the bleed valve at the caliper and force some more fluid into the caliper. Don't push the syringe as hard as you can or anything, but push hard enough that you can see and feel a small amount of fluid enter the caliper. Close valve and check lever pull now. I have done this a few times on various shimano systems to get a really "high and hard" lever. Seems to work.
It must be possible as my R785 levers have exactly the right amount of play. Mine were set up at Brixton Cycles so maybe worth getting another mechanic to have a look (I've no idea how much Scherrit has of hydraulic discs though).
http://forums.roadbikereview.com/components-wrenching/shimano-r785-disc-levers-have-excessive-free-stroke-343759.html
After you do a complete, thorough, and correct bleed, pump the lever a few times with the system closed. Then (keeping the lever end closed) open the bleed valve at the caliper and force some more fluid into the caliper. Don't push the syringe as hard as you can or anything, but push hard enough that you can see and feel a small amount of fluid enter the caliper. Close valve and check lever pull now. I have done this a few times on various shimano systems to get a really "high and hard" lever. Seems to work.