With neither Maton nor Nevin having worked out, the 2B 3B platoon is pretty much blown up. We are pretty much going to have to play both McKinstry and Ibanez full time, one is RH, one is LH. I'd say they are about equal at 3rd but Ibanez grades out better at 2nd so you have pretty much a non-platoon IF of Tork(3), Ibanez(4), McKinstry(5) and Baez(6). Short can start in place of McKinstry against LHP but that's going to be about as much platoon as you get on our IF now if you want to keep the best team on the field. History also argues Short is going to run down if he plays a lot.
The platoon dilemma is playing Baddoo over Vierling. Baddoo is more disruptive but Vierling has been the better hitter even against RHP. If they think Baddoo has upside potential we haven't seen (or think Vierling is playing over his head) then I guess you make the investment. Or you're just looking at individual pitcher/hitter matchups.