Kodak has other processes with shorter bleach and fix times.
I do believe that the LORR has double capacity. However, Kodak's capacities are ridiculously low, stating that one liter of unreplenished working regular developer can process 3 rolls of 36 exposure 35mm film. That is theoretically impossible because 250ml has to be able to process one roll of film, before one normally adds replenisher. There is no way to use more chemistry in standard tanks. I have in the past used one liter to process 12 rolls of film until I realized that I would never make it through my 20 liters of developer at that rate. Other kits say to re-use each unit of solution 3 times increasing time by 15" each round.