You realize keyboards are by far the most versatile instrument in the history of music? You're limiting your sound by not having a person who knows the ins and outs of how to fully utilize a monstrous machine like a keyboard. I can't think of a single Katatonia song that wouldn't benefit from at least some soundscaping. All of the most versatile bands I can think of off the top of my head understand this fact. Katatonia is expanding their sound, and they're also realizing this. In this day in age keyboards should just as vital a part of the standard band format as guitar, bass, and drums. It's not rocket science.