The technical problems are very important, in my opinion, the work steps are by drawing and two-dimensional design first with hand sketches as well, then starting the detail stage of floors, walls, lighting and furniture, then making a three-dimensional design for good imagination. In my opinion, after these steps, (detailed drawings) are made, which will adjust the quality the problems you mentioned.
Recuerda que hay dos formas de evaluar un elemento, primero desde el punto de vista meramente subjetivo si me gusta o no y el segundo es la valoración técnica echa por un experto. La valoración subjetiva todos la hacemos.