Hi.
So the biggest drawback I find with camera exports is that Reality Capture does not allow input of a Film back. Regardless of resolution, you should not need any type of imageplane offset if the input image represents the filmback size.
Most applications do not correctly support imageplane offsets so it’s very frustrating when you want to take the RC camera data into Maya and use it in Mari or Mudbox.
The Maya export has come a long way, but I do believe it still needs a lot of work.