Once Duncan starts going into one of his streaks where he is non-existent, I think the STL OF situation will be cleared up and Ludwick will emerge as the everyday guy. I kept Ludwick based on his season last year and too am highly frustrated by his lack of starts.
In my opinion, Ludwick earned the right to play everyday based on his performance last year and what he's done so far this year.
Rasmus, while certainlly a good prospect and all, hasn't earned that yet, and if anything, should be splitting time with Duncan or Ankiel.
La Russa claims that he will settle on a more permanent OF by May. Not sure what will change between now and then, but if it means Ludwick will be the everyday guy as a result - then fine. Ideally, the Cardinals need to trade one of their OFs.