The more I think about it, this dichotomy goes towards exactly why I'm not really feeling WC as a suspect. IF he is responsible, then at least to me, based on known information, half of his actions have been very shrewd, while the other half have been very stupid.
As a generality, if a potential suspect must have engaged in a combination of especially shrewd and especially stupid actions to pull off an unsolved crime, in my eyes they are unlikely to have committed it. I wish I could take credit for this concept but I can't, it came from Bill James' Popular Crime.
Obviously there are exceptions; whoever killed Missy Bevers seems to be one such smart/stupid lucky perp. And also obviously there could be more information known to LE that converts some of WC's hypothetical actions from "smart" to "stupid".