Transfer PvZ 2 data from old iPad2 to new
My son had an iPad 2 that he used to play Plants vs Zombies 2: It's About Time. He made a lot of progress and also made several purchases in the game. Last September he got a new iPad Air but when we loaded the game all of his previous purchases and progress were gone and I haven't found any way to get them back. With the new iOS you can't get into the file structure of the Apps like you used to be able to do (thanks a lot, Apple, for protecting me from myself <-- sarcasm) so I can't use iExplorer or anything to copy the data from one to the other. I just want the data from this one game, not the entire iPad, because he has other progress on games that he has since loaded on his new iPad that I don't want to erase. There seems to be no easy way to simply log out of the game on one device and log in on the other to get them to sync. I've tried various things through iCloud but now that there is no "Documents and Data" setting there you can't do it that way either.
This has been a colossal pain. You would think that across similar devices that this would be somewhat simple but in true Apple fashion that is not the case. Does anybody have a solution for this?
iPad Air, iOS 9.2