A family of Microsoft word processing software products for creating web, email, and print documents.
Are there any upgrades to Word that will help with rearranging pages as needed?
Unfortunately, no. Word very much remains a word processor although it has some page layout software features. The closest equivalent to rearranging pages is really to cut and paste the relevant content.
I need to be able to link a text box on page 1 of a newsletter to a text box on p5 [---]
It is possible to link text boxes in Word. (There is a limit to the number of such links in one and the same document, though.) The steps include clicking in the first text box, then click the Create Link option on the ribbon, and then clicking in the "target" text box. See the screen shot below.