I have no problems with porting stuff but...honestly, I would only ever play a "Souls" game on a PC with a gamepad. The game was built heavily around dual-analog sticks and mouse/keyboard would be incredibly cumbersome and hard to implement for this kind of game.
Of course, this is From Software were talking about, they will never port it to PC. Only game they ever ported to PC was the very first King's Field, and that PC release was sold primarily as a level creator software. Also it was only in Japan and it was long long time ago in the mid to late 90s.