I agree that none of them could ever take over (really they only way was if they smartened up and teamed up sooner)

Kendall tries to be as cold-blooded as his dad but he isn't as smart, and the lifetime of drug addiction is flat-out inexcusable to Logan

Shiv is just cunning enough to figure out things a beat late; she can't even be the CEO of her own marriage even though she would say she has Tom completely controlled

Roman is truly pathetic, a boy-man who is dying for any sort of perverted parental affection and buries his self-loathing behind non-stop irony

they are, however, merely dogs that Logan has kept on a leash "to kick over and over again"