This is not as trivial as you may think it is, because it requires one expression to match all variations of a title occuring in the book, one for all variations of author names etc. I don't believe it's possible to do this robustly enough and still retain the simplicity of just having to write (title) or something- at best, you'd end up with some sort of inferior copy of regular expressions.
Bottom line: Learn about regexes, it helps in more places than just using Calibre
