I have created (a long time ago) a billboard switcher that moved the billboard from position to position. The problem was that it required to change the main cam compound so, I did not share it.
Now that I can easily reference pins inside locked compounds here is the compound switcher
https://drive.google.com/file/d/1hhEQeiUqGwkLhiN4Du_gPFivTzoVHq-d/view?usp=sharing
As is, its just for Billboard 1, but it is trivial to make it for every billboard. Just clone it, open it and rename the control board from billboard1 to billboard2 and alter the Module the set transformation pin, to point from billboard 1, to 2, or 3.. etc (just change the number 1 to 2 in the Module field).
It adds a control board named Billboard1 to your control boards that looks like
Those "Position i" boxes are positions of the billboard. To change them graphically, enter the preview mode (as you do when you change the billboard position), with one of them selected, and move it where you want.
That's all.
At play time you just select the position, and will transition from current to new position
If you select the billboard position, you will see the following list of transition speeds
to control the speed from position a to position b
I hope it helps someone and saves some time..
The idea is very good, but where is the LIFT parameter?