1.5 oz of medium toast French oak is not too much. But six months is longer than I’ve gone on oak.
I’d pull it from the chips and age it for another six months before making a decision.
1.030 is a pretty high finishing gravity, so I can’t imagine adding any more sweetness.
Since I didn’t see a reply from the op on m y previous suggestion, let’s just say he pulled a small final gravity sample using a refractometer instead of a hydrometer. Using sean’s calculator Refractometer Calculator « SeanTerrill.com that translates to a final gravity of 1.0012, which is decidedly dry. I’m not saying he did use a refractometer, but if he did, I think this might explain it.