the 1830's were a transition period between what was worn prior (Napoleonic) to what was seen in the 1850's and 1860's. If I recall most of the reason for simplifying the Austrian armys uniforms was for cost reduction savings (where have I heard that before
) and this was the near middle of the beginning of the Industrial age where as far as Military trends were heading towards large standing armies.Plus civilian fashion trends also played a part as well.
( oh and as far as Female fashion goes.......... I have never understood that
)