I have quite a huge number of references because yawshan itself has quite a number of variations, thou it can be divided into 3 major types based on frontal plates. I based this one on type 1 yawshan;
with nice hinges from this type 1 (didn't wanted to go with belt, strap,rope variations);
About bulkiness, models base is Narfs corrazina, I figured if he went with this proportions for brigandine type of armor, the tickness ratio of type1 yawshan should be very simmilar;
brigandine (padding+fabric layers+all around plates)
/ type1 yawshan (padding+mail+frontal plates)
Thou I could scale it for couple percents if it will look more natural
Types 2 and 3 will be more bulkier since they have more plates.
About roundness, it is indeed too round, I'll scale it radial on the belt part a bit too see if it will be better.
I don't spend too much time on a single item, for both model tweaking and texture(all maps) making I usually spend one or two days since I'm trying to release AOC2 earlier and I am searching for some job in the meantime too. Unfortunately there are not much jobs for graphic designers in Serbia
Thanks for good crits lads and @Docm30: nice hat
EDIT:
Tweak it up a bit, no more roundness, I think version 2 is better, what do you lads think?
EDIT2:
And a bit bulkier;
