Tragedy of Lightning
First of all, I'm not from the region it's available therefore I'm a F2P player. So, I've been playing since launch and never got Ace, Minwu and Tifa. I'll have to say that I'm managing somehow but now people 1 tier below have Ace, Minwu, Tifa and they can deplete all my health in one or two turns. I have Selphie and Aerith UR+1 but before I cast them someone will launch me in the air or cast some powerful ability that'll finish me in seconds. It's becoming difficult to win, day after day. I really hope there is a system so the people who don't have these ability can have them after certain number of draws.
Note: My most powerful heroes (in terms of ability upgrades)are : Lightning and Crille. Clive would've been too, if only I had him instead of getting same heroes outfits again and again.