Because the enlarged ends are too low in the water in your design, the
boat would be slowed because the water would have to travel around them.
First out, then in, then out, then in. This would cause turbulance which
will slow the boat. If the increased volume ends rode higher on the hull
and were less exaggerated they would work better. If blended into the
hull shape they would look better. This would amount to a hull with
flaired ends at the gunnels and "tumblehome" amidships. This concept is
used possibly, though in a more subtle way, on a boat called a Baidarka,
invented a long time ago in the Aleutian Islands or Russia.
The fuller ends will also have the effect of making the boat ride over
the waves rather than going through them. Balancing the two movements is
a tradeoff either way. Do you want a corky buoyant hull that seesaws
over the water or a fast sleek hull that slices through the water?
Your hull would produce a boat that was extreme on the seesaw side.
Also, when your boat is leaned over to turn, the turbulance increases
and slows the boat alot.
I think your concept is interesting but that the features are too
exagerated to be practical. It also makes for a hull shape that is more
complex to build than ,say, a Greenland style Kayak.

Matt Langenfeld wrote:
A friend and I were goofing around talking about hull shape and we came
up with this:

http://www.jem.e-boat.net/images/Development/XYak1.jpg

The idea was stability and reserve buoyancy but still having the ability
for nice tight vertical strokes.

I'm not sure what to think. Innovative or just plain silly?