This was also a problem with PC - incomplete sets.
Even after some people pointed out what was missing...and even went to the trouble of graphically showing what was or wasn't in each theme set and sharing it here, they never bothered to flesh them out. You would think that they would work with a common style book for all theming that lists all the individual pieces and then design each piece accordingly, even if different designers worked different themes.
Just adds to the feeling of being rushed and incomplete, and certainly not up to the standards Frontier claims.