Hi Mellyboo,
1, Default OCR Language is really an omission. It will be fixed in the next minor update.
2, Handwriting Recognition is imperfect by now，only the handwriting by annotation in PDF will be recognized when using Rect Excerpt. It will be improved after several minor updates. We will firstly improve the Handwriting experience.
3, The old OCR is using for Auto Correct. It’s an option in menu for secondary proofreading.
4, Mac version will be released about one or two weeks later.
See the demo video: