You have a different kind of problem if your quotes are not attributed correctly, or punctuated poorly, so pay attention. Spelling and grammar problems. Because you couldn't send press releases with misspellings and grammar problems to editors and expect to be taken seriously. This is probably because you didn't read it out loud to yourself. Your writing should be as smooth as your conversation.
Good writing is never stuffy or pretentious.
Good writers don't use big words just because they sound important. One way to achieve this is to read your release out loud to yourself and see how it sounds.