There is a reason there are so many words in the dictionary. They communicate different, nuanced shades of meaning and emotion. Same with the grammar going beyo

There is a reason there are so many words in the dictionary. They communicate different, nuanced shades of meaning and emotion. Same with the grammar going beyond simple sentences. Dumbing down your prose, you lose all that power. Indeed, all this subtlety will be lost on the reader, who does not appreciate or understand it. So you should know your reader but aim not for the lowest possible denominator but close to the limit of their comprehension and appreciation. This way, you will have at your disposal of the full power of the language.