Controller really limits a player, but if you choose to limit yourself, so be it. I do hope SE down the line adds proper keyboard/mouse controls, but I'm not holding my breath... I have a top of the line controller as well as top of the line keyboard and mouse and of the two interfaces I prefer keyboard and mouse purely because I feel more restricted using the controller. I can't quickly change between action bars and spells with a controller because you have to scroll around. In addition, if you have a group of mobs you can't target the specific one you need to right away, you need to cycle through all of the targets in your field of view until you land on the one you need. A controller really restricts you as a player.