Unfortunately, as tends to happen with Canon cameras, it's got the features they figure people want, but not necessarily everything that people actually want. Lack of 24p is a big one, especially for those shooting and editing Hi-def then actually outputting for cine across to film. Ignorant fools and their "I want 24p because I want it to look like film!" can go and perform various forms of illegal physical acts upon themselves.
Lack of 720p is also a concern, especially as the HD spec does allow for both 720p and 1080i.
What do I care? I'm not likely to pick one up so I'll just happily sit back and listen to the inevitable bitching that occurs whenever a new product is launched.