Most likely due to the whole debacle surrounding loot boxes and gambling, EA Sports has decided to include an option that allows you to see what the probabilities are of each Ultimate Team pack in FIFA 19, meaning when you highlight a pack before buying and choose the Show Pack Probabilities option, you'll see the chances of getting a card in several categories.
It won't be so specific as telling you the odds of getting Cristiano Ronaldo, for example, but it will tell you the odds of getting a player over an 85 rating. You can get a full description of how all this works in EA Sports' official website.
As for the game itself, be sure to check out our review if you're interested. Is this new Show Pack Probabilities option good news?