To my mind this plane a third room is missing. You could do a little modifying the garage to give place to a third bedroom with en suite bathroom. Outside of that it seems to me a very good construction. Also if you use the drawing as a basis and using traditional construction it could build in stages. This last is very interesting for those who do not have all the money to make the construction of only once.
As we can see to the right of the construction we have the garage for two cars. At the front a small porch and entry. There is a proper Hall, directly entering the living room. This last form part of an environment where we have, in addition, the dining room and the kitchen from which we have access to a rear deck. On the left we have two bedrooms and a bathroom in the Middle, in the classic tandem. I fails to convince the doors from the master bedroom, I think that you could solve by making the entrance to this equal to the other bedroom.
As we can see is a simple design and even economic construct, ideal for families who are just beginning but who do not want to deprive themselves of a home comfortable and pleasant life.