Different suit of Saw younger Jyn
Saw’s Line “What will you become?” is in reference to people being modified by experimental surgery after war wounds… This may have been to do with the 2 criminals who had death warrants in 12 systems.
Basically this sub-plot was probably to feature fairly prominently with triangle face it would seem. Bounty Hunter & sort of a detective.
I have no idea who is talking to but I think it has to do with the experimental and highly illegal surgery. Cybernetic surgery. Ironically he has the process done to him post Geonosis.
The whole on Life Support part is missing as even though he had no legs and robot legs he still could not have run away from Jedha as he could not leave the machine in his base that was keeping him alive.
There are so many of these make up effects created that it’s totally unplausable that so much time would be spent on something that never got mentioned so it was part of the plot originally.
The Death Troopers are of the same ilk and are also cyborgs. They are Dead but alive by Cybernetics.