What I don't figure though is why someone wouldn't want to use 100 hours of flying time to prepare as much as they can. The CPL is not an attendance only course, it does require effort, but thus far it seems to favour those who put the effort in. I for one wouldn't be worried, but I would treat it with the respect it deserves. After all it's a professional licence.
The above is the biggest single problem.
People wasting their hour building doing it on the cheap (Aussie Air springs to mind)- and then thinking just turning up will get their pilot's licence totally unprepared.
Also a complete lack of the idea that this is a job and a profession! - Treat the CPL like a professional job and you'll do great. Think of yourself as a student and you'll struggle.