How to queue all add-ons for installation?

@Kiernyn  When installing the game, there should be a check box that says "add-ons available to download," as below (not in the red box; this screenshot was for something else).  Clicking the box should auto-select everything.

Also, I've found that the EA App will automatically try to install every single pack once I launch the game for the first time after reinstalling, so that may work for you too.