He explained why he uses Xeno in the name of his games on stream, the word represents the differences in the world whether people, elements etc... and the types of drama that can arise from that. He takes that and puts it in his games to create an experience using different concepts.
It doesn't need to resemble Xenogears in any manner because that's not what he's aiming for clearly if that were the case all the games would resemble Xenogears.