This is a proof of concept vehicle, not a production unit. If it were ever to go into production using the parameters of the patents, the points you bring up would be dealt with. The occupants in a T Rex or Tanom Invader are placed in a similar position. It is the nature of the design. Most vehicles have their weak points when it comes to safety. We are fortunate that we do not all have to drive Volvos.Looks really great. Kudos on building something very cool and Unique. Can't wait to see the body panels on it when you design them.
I too am a bit worried about the fuel tank being up front and how close the occupants are to the front in a collision. Would definitely move that tank somewhere to the middle or rear of the vehicle with more protection around it. Worse thing is in a collision that thing explodes or burns and your so close to it so out in the open it would be deadly.
I might also consider lengthening the front end a bit more with some more structural support just in case of a front end collision. I know its still safer than a motorcycle for sure. But if it's something you plan on manufacturing and selling those would be 2 areas where significant safety improvements could be put in. You don't want someone dying in a crash when it could have been avoided that will end any chance of getting what is a very cool project potentially out to the public.
Just some thoughts from someone that loves alternative vehicles and is a self proclaimed motor head lol...