I have the Comeo Breaker packs so I can't play Cinder yet, but he was released yesterday for Ultra Combo Edition. What is your first impression of Cinder?
But in general, I think it will take a lot longer to unlock the true potential of Cinder than most characters in the game. He's good at a lot of things but not amazing at any of them (except doing chip damage and frame traps). His neutral game will take many weeks before anyone can figure it out, I think.