Original Blog post from 快楽のスターグラス
Basic Translation (someone that can read japanese plz confirm)
Skill 1: Sterria Symphony EX Skill (active)
Can only be used in awaken state (hysteria).
Damage: 3400%
SA break : 2800%
Skill 2: Reckless Princess (active)
Use while in air, attack pushes ennmies back
Cost SG: 35
CD: 30s
Damage: 660%(LV1) - 1094%(LV5)
SA break: 700% - 1160%
Skill 3: Urubuji Show Time (active; not sure about the name, probably Korean):
Toss (projectile?) to summon Urubuji Phantom. Effet: attack ennemies and buff allies within range.
Cost SG: 30
CD : 30s
Damage: 1570% - 2602%
SA break: 682% - 1130%
Buff: Increase max HP by 600(LV1)/2000(LV5) for 60s. Effect and duration stackable 3 times.
Skill 4: Whirl Dance performance UP (extension to Whirl Dance):
Adds movement control while casting Whirl Dance. Obscure part of the description: while casting the spinning part of the animation, Stella receives extra defense/avoidance. NB: can be affected by special attacks
Damage: 77% - 111%, last hit: 385% - 558%
SA break : 34% - 20%, last hit: 173% - 251%
Skill 5: Soul scream Bass Stage (extension to Bass Attack)
Additional effect:
- Left Click: heavy attack + electroshock debuff
- Right Click: attack + allies SG regen
Specification:
- Left Click: Damage: 1341% - 1946%
SA break: 3354% - 4863%
Debuff: ElectroShock decrease 1% HP per second for 4-8s
- Right Click:Damage: 958% - 1390%
SA break: 2396% - 3474%
Support: Recover allies' SG, 4 - 10% per second, effect lasts 5s
Skill 6: Bounce Wave (passive):
Reduce CD of Trouble Pass, Beads Play, Best tempo in support mode.
CD: 60s
Effect: When using a support skill, all skill cast within 5s receives a 7/15% CD reduction.
I'd like to hear your thoughts about those changes 
PS: Haru's buff are pretty insane as well.
