You know this is one of those things that makes you think why have the fallen not made themselves something to augment their mobility? I mean it's clear that they love that stuff anyway, and not simply in a splicer sense. Guess it's not a common enough commodity for them whatever it might take. I am always reminded of the space pirates in metroid with the fallen. The space pirates don't really have ethics or anything like the fallen seem to have though lol. Literally try anything with little regards to consequence. Like shapeshifting only to completely kills themselves lol.