That's because Izturis is literally having one of the worst seasons of all time by WAR standards. Regression to the mean. Nobody can expect 2B to be this bad again this year, even if we rolled with the same trio.
What most guys are getting at is that realistically, we won't, not that we shouldn't, address everything. I'd feel a lot more comfortable with a new catcher, SP and Goins/Izturis/Kawa, dont really give a f*** which of those three it is, than keeping Arencibia, signing a SP and a guy like Kelly Johnson to play second.
Interested to hear your take. Which situation would you prefer to see?