Source: http://forums.gumi.sg/forum/news-boards/290410-global-exclusive-limited-edition-collaboration-event-sakura-miku?p=290537#post290537

Summoners, Check out some of the updates for Sakura Miku!

Previous

• Super Brave Burst - Ballad of Petals
• BC required: 27
• Max BC generated: 43 (1 BC/hit)
• 43 combo powerful Light attack on all foes, hugely boosts critical damage (100%), probable (30%) Spark critical for 3 turns, raises normal hit count for 3 turns ( 1) & probable (30%) huge 1 turn Atk reduction (-50%)

Update

• Super Brave Burst - Ballad of Petals
• BC required: 27
• Max BC generated: 43 (1 BC/hit)
• 43 combo powerful Light attack on all foes, hugely boosts critical damage (100%), probable (30%) Spark critical for 3 turns, raises normal hit count for 3 turns ( 2) & probable (30%) huge 1 turn Atk reduction (-50%)

Previous SP Options

• [SP Cost: 20] Enhances critical damage boost effect added to LS ( 50%)
• [SP Cost: 70] Allows probable 1 turn Atk reduction effects from SBB to last for 2 turns
• [SP Cost: 80] Adds hugely raises normal hit amount effect to UBB ( 3)

Update SP Options

• [SP Cost: 40] Enhances critical damage boost effect added to LS ( 100%)
• [SP Cost: 60] Allows probable 1 turn Atk reduction effects from SBB to last for 2 turns
• [SP Cost: 60] Adds hugely raises normal hit amount effect to UBB ( 3)

(Changes in bold)

This screws with the builds I posted yesterday, so I'm going to have to change them around to suit the update. I'll post the updated builds in this thread later.