Add-on benefits for US sub campaign?

[Brausepaul]

So, I just noticed that the add-on was released a few weeks ago. What goodies does the add-on bring for sub skippers still sinking Japanese marus?

[Raptor1]

It brings forth the gift of faster loading time, a better equipment screen, cooler objective icons, the possibility of future modding, and a little text label at the bottom right of your screen proudly stating "1.5"

Also, you should try the U-Boat campaign as well, several Fleetboaters around here had no intention of playing it at the start but found it quite enjoyable later