I initially thought this was a bug but then, I was referred to the "UE4 Questions" posting where it was stated this was an intentional feature removal from UE4.
I can't understand why NCSoft made the decision to remove the gamepad/controller support in UE4, considering the impact it would have in a good portion of the existing community. I have used a controller since day 1 (founder here), to reduce the pain / stress in my hands from the use of a mouse and keyboard for extended periods of time (3 or more hours).
As you may figure I am not a young man and forcing me now to re-learn how to play the game using a keyboard and mouse, it is a joke as my hands won't last long.
I thought the marketing idea behind the UE4 release was to bring people back and increase the player base but instead, NCSoft managed to send a clear message to those active players like me, that they don't want me playing the game any more.
There are many players just like me, with health issues on their hands, who can't grind dailies/weeklies in multiple chars using keyboard/mouse without destroying their hands.
I hope NCSoft reconsiders their decision and add back the gamepad/controller option in game. The feature already existed in UE3 and as many have stated, fully supported in UE4.
It would be bad for NCSoft to be known as a company who discriminates players with partial or full health limitations. Players who need more friendly accessories to play the game.