Common App Essay Word Count

I know the maximum word count for Common App is 650 and that most people write around 500-600, but I have 384 words for mine. I wrote on the first prompt, and I basically copy pasted one of my UC personal insights into the Common App prompt and edited it a little bit.
Is 384 too little?

Does it show you in the best possible light? Is it the essay you would have written, had you not already had a UC essay all ready to go?

Will you regret leaving those 260 words on the table?