I've been playing with DS4 using the basic no-frills gamepad configuration (not the official config) and it's working well enough, with autoaim. The mostly missing keyboard functionality is indeed super annoying and they should revamp their input system to allow input from any active device. I lost some prime parts in a defense fissure when I was trying to type something in chat and the relic choice window came up; the UI got stuck, no keys or buttons worked, the other guys left and I was alone -> ragequit. The UI getting stuck is no news, but I'm pretty sure the controller/kb mixup had something to do with it in that case.