More changes than expected with the result that many (most?) of the queries and scripts published on this site won’t work with RM8 databases.
CitationLinkTable: was expected to support the announced new feature of master citations.
AncestryTable and FamilySearchTable: replace the former LinkAncestryTable and LinkTable, now gone.
TagTable: looks to have replaced LabelTable, now gone.
TaskTable and TaskLinkTable: appear to have replaced ResearchTable and ResearchItemTable, now gone.
Every Table has, as its last column, a new column named UTCModDate, apparently intended to track the date on which a record was added or last changed.