Just tested out Lucina Fsmashing Marth. At 85%, kills at both the tip and anywhere else. At 84%, cannot kill no matter where on the blade.
Seems like Lucina's knockback has been made the same throughout the blade, like how Sakurai stated it should be. Haven't tried out the other moves though.
Reference:
http://smashboards.com/threads/before-you-ask-the-differences-between-marth-and-lucina.376180/
Dsmash is now consistent as well (tested furthest in and the tip; if you hit in the middle it will send them upwards instead of horizontally).
So no, not all changes have been found out. Dsmash has indeed changed, if my reference was correct.