No, this is how it works with SU10 … Currently, the priorization is the position in the content file. With SU10 you can set the prio via a own attribut in the new content file, independet of the line where you add the package.
Further, currently you need the content file because it tells the sim which packages will be loaded when. With SU10 you don’t need the content file because all packages will be loaded from the sim automatically.
… and thats what I have explained above.
As reference from the MSFS developer forum - posted from an Asobo employee:
Cheers
Richard