Nava's splits are pretty heavy --
.229/.316/.354/.670
.322/.430/.537/.967
I would argue that it is probably worth continuing the platoon. Gomes is 32 years old, healthy, and has a career .880 OPS against lefties in places like Tampa and Oakland. The guy can hit lefties, and I don't think its fair to judge 60 ABs against them in 2013 -- especially since half of them are from the likes of Pettite, Sabathia, Price, Chen, Cliff Lee, and Holland.