Katatonia will never record an acoustic album, it could be an ep, but I would hardly believe in it. The only songs I can call acoustic (with the great approximation) is: A Darkness Coming, Omerta, O How I Enjoy the Light. It would be nice to hear the real acoustic version of this songs, because there will be no big loss in the sound. Nevertheless, I don't think I need two versions of one Katatonia song (I was truly disappointed with the fact that there will be three versions of My Twin: original, single edit, opium dub), so I will not enjoy such ep. An acoustic album is a great idea, but not in Katatonia style. Opeth have proved it with their solid work Damnation, but without Deliverance Damnation costs nothing. I think, first I need to hear Katatonia playing a real acoustic song, then I will say if I want an acoustic album.
Opeth - Windowpain