I think you are missing the whole point of Zebralight's design. They are designed to be as small as possible and use the most advanced thermal regulation in the industry to still allow use of extremely high outputs. Yes, in average conditions they will only hold that output for a while(long enough to put your dog out or do other daily tasks)but, their thermal regulation is designed to step down in such small increments that it is hardly noticed. If you want extremely high sustained outputs you need to go with a much larger multi cell light. And, there are plenty of light companies making large lights already. ZL's niche is extremely small easy to carry EDC lights. Also, keep in mind a single cell light running outputs like on some of the new models would kill a VTC6 in only minutes which isn't very practical or useful even if it could do it anyway imo. A single 18650 only has so much capacity and you need 3 - 4 of them for a descent runtime at sustained high outputs.
