I thought the Lawton tether setup is meant to be more like the Chicane, in that you adjoin the tether to the hitch climber (or whatever pulley you use) with a carabiner, in order to facilitate a quick transition to/from MRS/DdRT (not requiring the system to be more-or-less fully disassembled, as is normally required with the typical setups where the hitch, tending pulley, and saddle connection are all combined into one).
In other words, by the time you add the carabiner in there, it's about the same length as a normal setup, but is much shorter than if one were to do a comparable setup with a 'normal'-length tether.