Can't agree with any of the above which suggests using CC results in less range than driver control.CC is a carryover from ICE days, and meant to reduce fatigue for drivers, not optimize efficiency. Over time, maybe engineers will devote more time to optimizing efficiency, but for now they use good enough routines and put products out for general use.
I'm an old guy who grew up using last-century hypermiling techniques, but they were hard work for the reward. There were many times I tested CC against manual control and only when there was a true coast-in-neutral option did it pay off. In the late century, GM designed automatic transmissions with a freewheel coasting function. The downside was they ate brakes like popcorn. Then, with the advent of computer EFI which could shut off fuel on decel, coasting in neutral actually increased fuel use, as the engine stayed running at idle.
Bottom line - until someone can prove a negative to the Bolt CC via instrumented testing, I'm of the opinion it works well and efficiently.