Thank you all for sharing your knowledge!
Since my last post somehow doesn’t show up, I try again.
I decided to first set up the whole scene with animations (the tree growing, leaves gone with the wind, color change, text) and as the last step added camera zoom and movement. Because all elements are vector layers, by activating “continuously rasterize” the resolution stays perfectly sharp all the time.
This workflow was easygoing and I enables me to make changes very quickly. Compared to a recent project where I modified size and position, the camera is much more comfortable to use.
I dropped the idea with the seed because I have to get better with AE first before I am ready to use such things in production.
If you are interested, this is the final animation:
https://vimeo.com/261075023
Thank you all once again, have a nice day!
Tom