The other factor I propose is the accumulation of talent instead of the shuffling of talent going on with the Upton trade proposals, Span, Choo, etc. A short term FA like Victorino adds talent without losing prospects. Not knowing what a Fowler or Span would cost, and knowing their question marks, makes a FA CF more attractive than spending a lot in player resources this year. Upton is a guy I can't figure out. I'm gun shy after I spent Summer of 2011 begging for Jiminez. A true buy low (like Jim Edmonds was to Walt 10 years ago) would be great, but nothing like the Latos give would be worry free.
I really think CF is a desperate area, as others have said recently on here. So, I've chosen to address it before LF, where my choice would also lean FA, Ludwick. Signing a FA to fix CF adds talent and upgrades the roster without thinning out the system again. Letting Hamilton, Cingrani, Corcino and some others develop one more year is probably a good thing.