As already noted, the 7th edition includes improvements in this area, but not enough In the end, Corrigan's book has lots of scattered insights and bits of advice that are great in and of themselves, but the more pertinent are under-developed and often lost in a sea of verbosity and diffusive aims.
This is the task on which Corrigan should have limited himself, given the obvious desire to keep the book small, and this is the aspect of the book that works best.
It is thus almost as disappointing as it is helpful. But it bears noting that there simply aren't many books available which do address this specific subject, so my praise has to be understood in that context. Appendices include a list of common editorial symbols, a glossary, and an index.
Third, the text is part film writing primer. It is true that Corrigan tends to wax a bit loquacious, letting wordy and meandering discussion often obscure the really important things he has to say.
These are all welcome and significant enhancements. For example, his discussions in the first and fourth chapters of different approaches to film criticism and of different kinds of essays about film are each limited to a few meager pages.