jerinaldi Its probably important to recognize that the "duckbill" that Matt has used is a nose cone designed for surf skis which are very common in Australia. That means they may not work so well in other sea conditions. There are many kayaks being manufactured now incorporating wave deflection into the bow design. Perhaps the most common is where the top deck of the bow is extended outwards 2-3" to form a lip with a curved under surface - similar to the windrider 17 seen in this picture
Of course the windrider is not a kayak but I have seen similar configurations appearing on newer model (non-sailing) kayaks.
Designing something for most sea conditions and certainly a wave deflector that is safe in rougher seas is quite complex and I am sure Hobie are taking their time to get that right. Of course you can buy the Hobie spray dodger for your spray protection and maybe experiment with weight placement to help reduce the submarining. There are lots of other threads on reducing spray and minimizing the submarine effect so you might find some good discussions with a search on this.
Life is the Journey - not the Destination