More intelligent posters than myself have argued that Espinosa's projected offensive value is much higher at SS rather than at 2B. (If I'm remembering correctly)
i know what you're saying, but i don't believe in that. who cares where he plays as long as he hits and plays good defense. dan uggla isn't your protypical 2B, but he seems to be doing something right in florida.
if there are better options in the line-up than desmond, then by all means ... play that option.