I would add a bit more red to her shade to avoid the buckskin-look, and I would bring the black down a bit on the legs. But bays can vary and these are mostly personal things. She's a nice looking horse as well ;3
I think that, out of my three designs, she is the weaker link. Bays aren't my strongest suit, and I ended up re-doing her three times because I wasn't quite satisfied with her. I may touch her up as well tomorrow.