It was getting harder to contact Zion, and their mother was genuinely worried because of his tendencies. Zion was even aware that she had implanted a tracking chip inside his body, and he removed it himself. That wasn't something a normal child his age should have been capable of.
A genius who was too lazy to overwork, or maybe that was just a common trait among highly intelligent people, who sometimes had a slightly misanthropic side. That also depends.
William, for one, was grateful that he had turned down the offer to be the successor. The Hughes family tradition dictated that properties were passed down to the omega children of the heir, and that omega would later manage a portion of the family's estate. William had been raised with the expectation of becoming the successor from a young age, but he had always felt that life didn't suit him. He also wasn't particularly good at interacting with people in public.