5C's change isn't that much of a nerf. I think it's just so it prevents 5C > 5C from happening.
Renka's change is both good and bad. Good: 2nd hit wall bounces, possible combo without use of any stars. Bad: 120% Proration gone, don't know what we'll get instead.
Hotaru I see that as an improvement over previous loketests where there weren't any known combos for it outside of the corner.
623A moves less, is just all around bad, it was great for getting in on zoners.
Also, why decrease 6A's distance? It's already useless as an anti-air.