Hi Paul,
What I don't like about your design is purely a matter of taste, really. I think the design of the boat is pretty much OK, except that I think the bow part is a bit too bulky. If you look at the original, you'll see that there is quite a bit of flare to the hull up to where the lower deck starts, which adds some elegance to it. I am missing that in your design…, however I can see where it is coming from (ease of building).
It is more that this type of vessel is a bit too sedate for me what I don't like about it, although I can appreciate a well built classical yacht (which is of course why I am still following the topic!)
Oh, and I think the raised foredeck part should go on a bit further back, or at least the hull should – creating some gunwales / bulwarks (how would you call it… damn foreign languages) between the high and low deck and visually stretching the bow even further. But once again – purely personal taste.