If the cam output is 60p, convert it to ProRes first, then open up the file in Cinema Tools and conform it to 30p (or 24p).
When played on a 30p (29.97) timeline, the file will play at 1/2 the speed of the 60p original file with all frames intact.
Something to keep in mind - Cinema Tools changes the file you bring in (destructive edit) so don't do this on the original.
If you want "one tool tries to do everything" video editing software, you may want to head over to Final Cut X.
Personally, I don't mind the modular tool box approach to the software. I suppose it follows from the way that I thought about audio equipment as a teenager - buy the best bits I could afford and only upgrade when necessary.