Yes I have 2A on the way back, but on the outbound it's already taken. I currently have 2K, but 1K is also available. I flew in 1K when I first flew the new F and I don't remember any issues, but I do generally prefer the second row. Only benefit of 1K here is that there is no one right next to me since the entrance to 1E is on the A side.
So if it were up to you, 2K or 1K?
Between 1K and 2K, I would prefer 2K because I would prioritise being further away from the galley over not having the door of 2F next to me. After all, the whole point of the fully enclosed suite is that you shouldn't be seeing too much of anyone else in any event!