The Auto Focus crawls in low light, which can be frustrating if you are on a tight deadline. And, the night mode didn't improve functioning in low light. Plus, you may have the problem of the camcorder focusing on something that you don't want when there's less light. For example, you may get the house in focus, but not the black fox in front of it.
While you're shooting, you can't change the white balance. You'll have to stop what you are filming, change modes and start filming again. This could be very frustrating for someone working on a deadline. Even though there's a cine mode, this camcorder will never fully work for more professional-looking videos.
Perhaps the biggest disappointment for this model was the design. In an attempt to improve the zoom lens, the camcorder is too big to fit inside a normal pocket. The hand strap is made of lower grade plastic as opposed to mesh material, and it hangs really low.
Another issue that could lead to trouble is that the Advanced Accessory Shoe door. It's not connected to the camcorder. So, when you go to take it off, you can lose it if you don't stick it in your pocket. You may want to figure out a way to add a string to it and attach that to the camcorder. That way if you take it off, it just hangs off the camera like a lens cover with a strap.
The zoom toggle is also a bit of a disappointment. It's harder to use since it sits right up against the body of the camcorder. While it's responsive, it will take some getting used to.