I did a little more optimization to the Wink project (now down to 246 kb) that mimics your BB Flashproject and have attached a zip file with the project and rendered file. You may replace your example with this one if you want to.
It is impossible to do simple edits of cursor position in both Camtasia and BB FlashBack.
Can't speak for Camtasia, but Flashback allows changing the cursor position.
I know it is possible to rerecord cursorpositions in BB Flashback but I don't find this particularly easy to do since it is hard to match the flow of the captured movie. Is there another way?
I say no. Wink 1.5 got quite a ressource hog with larger projects, editing got a pain.
Yes, when only using timed capture, projects can easily exceed 500-1000 frames which does puts Wink under a lot of strain. But a typical input-driven captured project is often only around 100-200 frames and can easily be handled by Wink.
Also it's not quite easy to insert another Wink movie. Did Wink 2.0 improve?
Wink is a bit different to other screencast tools in this regard but not more difficult (when you know the way

). Multiple projects can be opened simultaneously in Wink and then it is a simple matter of copy-and-paste or drag-and-drop of frames/thumbnails between projects.
As we have already concluded, in the end it is all a matter of preferences and goals.

Also while I think the screencast review at this site is really great I don't agree in all the conclusions because I have different preferences to match.