Allow adding annotations via CellAnnotationList?
Otherwise find a faster way to jump from the cell directly into the post annotator. There could be an extra button in the Cell-Editor for example.
Another suggestion (if technically possible): After jumping into Post Annotator there could pop up a "back to grid"-button or something like that to get back faster to the grid after making the edits.
At the moment I have to open Piecemaker, find the timeline, find the video and then finally open Post Annotator.