I also began to wish the camera would just stay still and let me take the scene in, many of the camera moves just seemed rather distracting. I was always taught that ideally any move should be motivated by movement in the frame, but at the very least the beginning and end should be distinctly different in content. I'm also interested why you chose to cut on movement, and then opposing movement either side of a cut? (So cutting from a zooming in shot to one which is zooming out, say?)
The other thing which struck me on second viewing is that the sequences of the herbarium and the polython rather ask to be given what I've always referred to as the "show and tell" treatment. In other words, the curator would be next to the things he's referring to as he talks about them and can refer to them in shot, with cutaways that match the master take if required. (If you watch the current Lucy Worsley programme, that sort of technique gets used very successfully there.)