Again from the ffxiv reddit discord, here's a more indepth explanation to some things and some clarification.

・疾風迅雷周りが今のバトルコンテンツに噛み合ってない
Greased Lightning currently does not feel right nor it matches the current battle content

・疾風迅雷を特性にしようと思っているがそうするとほぼ全てのアクションに手を入れる必要が出てくる
Greased Lightning is currently underway to be converted as a trait but doing so will require almost every action to be adjusted for this purpose

・めちゃくちゃな工数がかかるので大改修はパッチ5.4を予定
Doing so will require a lot of cost so the major revamp will be scheduled for patch 5.4

・踏鳴のリキャストを短縮
As for now, Perfect Balance will have cooldowns adjusted

・演舞1の型の条件を無くす
Form Shift will have Opo-opo form requirement removed

I am not sure what the form shift of no more opo-opo means but I guess I have to wait and see.

Edit: A disclaimer was added that it would be best to wait for the patch notes to see the full effects.