quickNdirty reactions (some perhaps way too picky on my part):
Anthropomorphic Mice Dungeon Master’s Guide ... WHAT ?! ... Where? ... I want that !!
Sword (no 's) Coast Adventurer's Guide
Genasi , versions like Elves ?
Shifter , version like Elves ?
Subraces Revenant [italics please] Gothic Heroes [/italics] (minorly confusing, might be my kitty avatar's fault on that)
Zend (no R) ikar
Zendikar Humans have a Standard renamed, but the 3 others while variant Variants are too specific to be casually called "variant"
maybe the renamed stuff could be noted for which originals they're fluffed from
Maybe call it the "Old" Favored Soul in a probably errata'd pile.
Which could include the first redo on Ranger and Mystic too.
Eberron has Wizard Artificer. You could
put that in the errata pile,
but I think the differences with the more recent Arty Not Wizard
and the Eberron fanboys will riot, would mean keeping it.
Some of the wizards site was in maintenance today, but the pdfs still worked.https://media.wizards.com/2015/downloads/dnd/UA_Eberron_v1.1.pdf