The Charlotte Family was not under much pressure to survive now. There was no need to turn their own children into neither human nor ghost just to gain greater power.
And besides, once their emotions were gone, where would their conviction come from?
Without conviction, how could they awaken Haki?
Unable to awaken Haki, no matter how strong their bodies were, they could not become powerhouses above A-rank. Besides, Cyborgs being immune to seawater and Seastone instead made it impossible to use Seastone to improve training results. Their starting point was too high to ensure sufficient training intensity, so it would be difficult for them to grow quickly afterward.
This could also be seen from the performances of the three Vinsmoke brothers in the original timeline. Even among B-rank fighters, they were not particularly outstanding.
Without considering ability counters, combat power at that level might not even surpass Cracker's Biscuit Soldiers. Why alter the children's bloodline factors for that, and spend so much money making Battle Suits?
This also showed that while Vinsmoke Judge was certainly clever, he was also truly foolish. He had made his sons pay such a great price, only to lock down their potential instead.
Other people screwed over their fathers; he screwed over his sons!
Speaking of which, Sanji—the "good-for-nothing" in Judge's eyes—had instead gained a blessing in disguise. Because of the powerful medicine his mother had desperately taken, which severely harmed her body, his emotions had been preserved. Thus, he still had the possibility of awakening Haki.
And because the effects of his bloodline factor alterations had failed to manifest right after his birth, Sanji had suffered relentless bullying as a child. Yet precisely because he was weak, it had been easier to ensure sufficient training intensity. Once he was grown and strong enough