Un1que
I think you can use the swallow- swallow fruit better , like - put a person that has a devil fruit power and a normal fruit into the swallow space, then kill the user, after that the devil fruit power will reincarnate into the fruit because it can’t get out of the swallow space, and he can get devil fruits like blackbeard.
I hope mc can eventually learn to take on the traits of the things he devours as well as mitigate the curse of the sea by using a chakra coating. I mean imagine eating a dog and being able to “merge” its sense of smell with his body in the glutton glutton space. He can even make an internal “world” by devouring things and eventually learn to take the beneficial traits of everything he has eaten. That’d be awesome.