A question about word order

This morning while reading the preface of a book about English language usage, I came across the following sentence: THE COMPLETE PLAIN WORDS has a plain enough purpose: to make the task of writing easier for those who wish to write better than they now do. I questioned the word order at the end of the sentence, and I was wondering if anyone else questioned it. So, do you think,

• the word order is correct.
• the adverb should follow the verb.
• I shouldn't worry about it; it's just a matter of personal style.