Haha thank you for the catch! A dyslexic + autocorrect = a lot of errors haha
I haven't heard the Siah Aimian theory before!
Also, feel Syl becoming human fits Kaladins arc well. Be that if he dies in book 5 he leaves a human Syl behind, if he is a part of a new oath pact leaving Syl behind human (would be heartbreaking) and also if he survives book 5 they set up a Hospital to tackle mental health together, allowing Kaladin to leave the battlefield.