One of the use-cases that Finale has no adequate solution for is movement titles in a multi-movement piece with linked parts. Another less common use case is performance instructions that must appear as a footnote on the page of a specific measure in both score and part where the notation occurs. Years ago I suggested adding horizontal page positioning to the Positioning tab of the expression designer. (Also optional vertical page positioning.)

FWIW: I have recently released a third-party plugin that kind of does this. It looks for expressions with specific features in a specific category or with certain predefined descriptions. It then positions them horizontally relative to the current page in that part. (And vertically if the description specifies it.) Here is a description of how to use it that will give some idea of how it addresses the two use cases.

Even if I say so myself, it works like a dream. Finale should have these options built in.