Ramierez will have a better year than Alfonso in my opinion, so I would not hesitate in trading Alfonso. And Klesko does not have much around him in the lineup in San Diego, so Palmerio over him would be a good move too. So I would do that trade if the other guy would.
You look pretty good pitching, might be a little short on saves. Maybe dealing Jimenez for someone like Jorge from Baltimore might be about the same saves and help your ERA/WHIP with him.
As far as your hitting, looks ok. Like you said, no real masters in anything, which can be good, becuase if someone slumps or gets hurt, your team does not. Only think you might be short on is SB. Maybe someone like Pierre in the OF would be a nice upgrade over Cruz if you could get him.