Imagine console games being made to comply with the otherwise superior keyboard and mouse controls, and you'd have to control a pointer with your control stick. It's absurd
It wouldn't have to be a direct a direct mapping of functions, and not for all game features. Hopefully as more information if reveal, how it is being implemented will alleviate your concerns that current functionality is being (or will be) ripped out of the engine to make the controller work.
Originally Posted by Linio
How the fork will work though?
AFAIK there are no plans to continue maintaining the released version of the game. The enhanced edition needed to be separate due to the changes with the engine (switching from DX 9c to 11 for Windows, etc) as well as to the game itself (additions and changes to quests, skills, abilities, etc), with effect the system requirements (64 bit only) and mean saved game compatibility could not be maintained.
There are multiple changes to the loot system, and the game economy in general. Since there were changes to quests and the end of the game, achievements will have to be redone, as well (and of course there will have to be an achievement or two added for the harder difficulty mode, etc).
There are 2 games which have started development using the same engine and gameplay mechanics.
