I made a new thread, with a describing title.
For anyone else switching over from "The other side"
I had a pleasant Tech-exchange with Franco (OPN developer/Guru) yesterday ...
Again OPN "shines" ..
It ended up in a shell script, automating the alias import from CE-2.7.0
Get it here
https://forum.opnsense.org/index.php?topic=36683.msg179305#msg179305
You will have to "backup" the Alias section of your pfS , and use that file as input to the script.
See doc inside the script.
Note:
The script will delete all your existing OPN aliases - Only use it on a test OPN install.
I made a VBOX test install, to do the importing.