4-piece character development? That would work well.
The fact this is landing when I am laying plans to crack the sphere on one of my game worlds is quite serendipitous.
They did incorporate Dralasites and Yazarians (Hadozee) into Spelljammer at one point. I too am tickled by the inclusions, though a bit disappointed they defaulted plasmoids to 1-2 arms & legs. Pentapodal Dralasites were the art standard. The pseudopod kind of fills that spot, but it isn't quite the same.