Being able to see how the move affects the upcoming turns is quite nice. One thing that bugs me about Final Fantasy Opera Omnia is how moves that grant speed buffs or debuffs don't reflect the new status in the turn queue before the buff/debuff actually occurs. I've had instances where I was trying to plan my turns in a specific way, only to find the queue suddenly changing because one of my characters gave themselves a speed buff.
This might be hard to implement if buffs/debuffs are not guaranteed to work, however. Judging by the system you've made for the Luck stat, it would seem that there will be times when they are not sure things. Come to think of it, they aren't always guaranteed in Opera Omnia either (some enemies resist speed debuffs, etc.) so that might be the reason for it being how it is.