Am I the only one to find that using only the 1,000 most common words actually makes thing harder to understand? The writer ends up having to use convoluted paraphrases to refer to things where a precise, well defined and well understood word exists but it's not part of the top 1,000.
Having to continually fall back on silly terms like "up goer" does nothing to enhance understanding when you can define what a rocket is and then just use the word rocket.