No doubt, the top of the order plus Casas need to improve, but that is not a problem easily fixed or improved, unless you are advocating a significant line-up juggling or "musical chairs."
The main issue, at the top, has been Duran. Our 1 slot has a .304 OBP. Our 2 slot has not been himself, but the slot does have a .346 OBP. The 3 slot has done very well (.367 OBP and .484 SLG.)
The 4 and 5 slots have come up short (.715 OPS, combined.)
The 8 and 9 slots are black holes that I guess some are fine with, due to their D. I'm fine with one, but to me, two becomes an issue that should be improved, if possible, and without destroying the defense. While Rafaela is better than Anthony on defense, when Anthony is healthy, his D is fine.