Review by Michael Hession at Gizmodo
gizmodo.com/canon-70d-review-dslr-video-nirvana-comes-more-into-fo-1444911115
"Unfortunately, for Canon and its many excited customers, the 70D stops there when it comes to offering video shooters anything new. The video quality is not improved one bit over previous models. It still exhibits significant moire distortion in certain subjects, and just looks a bit muddy in finely detailed shots. True, it's no worse than every other DSLR out there except the very top end—the 5D Mark III and Nikon D800. But still, we should expect some kind of quality improvement over 5 years.
Perhaps more inexplicable is the lack of headphone jack. How does Canon expect a video shooter to choose the 70D when they are unable to monitor audio? It doesn’t make sense."
in comments-"GH3 controls moire reasonably well and is superior than Canon APS-C video in that
regard (also more detail)".