As I often do, I will play the devil's advocate. I understand this is a concept boat currently--but once the build begins, it gets mighty expensive very quickly. My first thought is that prop has no protection. This is a real negitive in a trailerable boat--and probably would be a deal killer in the SE waters. Is there a keel? Where is the rudder? Not in the rendering--inboard or stern mounted? Tunnel hulls have been associated with some handling problems.
No swim step--understand if this is a sportfisher--but you need to offer a swim step as an option or standard item. Some like transom doors, others do not. The flimsy starboard transom. door which is found on many production boats is a real detriment. These are easily broken, the hinges deform, latches often missalign. If you are adding a transom door, consider a full thickness, heavy duty hinge unit, like a real sportfisher. The other issue is seas aboard thru the cockpit door, with a engine access thru the floor. One of the major issues with many express cruisers and sport fishers is the potential water intrusion into the engine space/bilge from a boarding sea aft.
Is this a self bailing cockpit? Where is the engine box?--this will take up a lot of the cockpit--unless the cockpit is very high. Where is the tankage--what is the tankage. An engine to push this size boat at 18 knots is going to use a fair amount of fuel. (consider 10 gallons an hour)
The 10 degree deadrise V--this is no longer a semi dory--and the question becomes how about the speeds between displacement and full plane?--this is where the semi dory excells. A 10 degree dead rise will not do will in heavy chop or seas. You will have to slow to displacement or semi displacement speeds.
Sleeps 6!-lets get real--where are you putting the third double bunk? I agree with the comment about weight distribution. This is an issue that was missed on the Tom Cat 255, with more weight on the stb side on standard boat.
I would also like to see what the prospective price will be--as well as the HP of the engine--and what engine is proposed. I suspect that you will need at least 200 hp to get the speeds which are "advertised". Then the issue becomes what is the fuel capacity?
I do like putting the spring line cleat near the foreward cabin window--but in a boat this size, a second spring line is really not necessary.
It will be most interesting to see how this project comes along. Again, thanks for the updates