Ein was definitely deserving of buffs. The dude really has to work in order to compete with some other characters.
I'm glad that Ayane has been buffed more than she was nerfed. 4P getting its Vanilla launch status back makes me delighted because I use that move a lot. Unfortunately, I'll guess that I'll have to adjust the usage of BT PP6KK4 if you will be able to react to final K from the string. Not a horrible nerf but a very noticeable one, however Ayane has more than enough tools to make up for it.
Judging by how the Japanese play Kokoro, she is a rushdown monster that completely complements their style of play. She has gotten nerfed in every patch since DOA4. This has to be aggravating for Western Kokoro players.