Agreed on the railings, just finish them off to Shipbucket standard. The hull doesn't conform to the standard of shading. Re the superstructure; looking close up it does look odd the way you've applied a blue shade onto a white background. Admittedly, its not easy working with white, but you are showing a lot of shading where there is no overhangs or the need to indicate a curved surface - as in the bridge front. I personally opt for showing the light coming from the bows aft, so that would call for a lighter shade anyway, but with white you're probably best leaving this out as you really can't go lighter anyway. And you don't need to apply that deep shading under items such as lifeboats; and you've invented your own doors, which again aren't standard and appear to extend down to the deck - not realistic. As you are producing a large amount of work - and well done, you should now get back to the guidelines to get your drawings acceptable.
Keep up the good work on Real life