The change of the Gramps User Directory from %AppData% (the Roaming appdata in Gramps 5.1.x and earlier) to %LocalAppData% (the Local appdata in Grams 5.2) is very important. (Migrating filters from custom_filters.xml and settings from the report_options.xml may have to be done manually.)
See wiki subheading Gramps 5.2 Wik _Manual - User_Directory : MS Windows
How will this item be included in the Release notes? Does it need a PR or MantisBT report to get a line item in the bullet points?
Does the 5.2 User Directory path remain the same as in 5.1.x for Linus, macOS and PortableApps?