The connotation of drastic always being negative is through common usage and not strict definition. See: https://www.merriam-webster.com/dictionary/drastically

The connotation of drastic always being negative is through common usage and not strict definition. See: https://www.merriam-webster.com/dictionary/drastically https://www.merriam-webster.com/dictionary/drastically Using drastic in this instance is an appropriate, but rare, usage in a positive sense. You are correct that dramatic would be a more commonly used neutral synonym, but using drastic is technically just fine here. It is only slightly odd usage by common practice, but as a native english speaker I hardly noticed it until you pointed it out. By using a less common word and outside of the common usage of that word, to my ear this adds emphasis, like reading the word in BOLD text or capitalized.