Oh god he's too cute ;o; I dont want to like- seem rude, but if you have a tan and/or browish spraypaint, you could spray over some parts to really give it that siamese look. Everything else looks wonderful, since I cant make a plush myself. xD
Although you could have made him white and black on purpose since it's a cat/fox so that works too ;u;
You use an airbrush with acrylics/Indian ink? The way I have done it just involves a fabric dye marker (or sharpie, and apparently Copic markers work from what I've read) and an old brush, since I can't afford an airbrush. I just typically mark the center heavily until the fur's somewhat saturated, and then brush the color to spread it in a way that looks right.
Is the airbrush much easier? If so, I may reconsider that and just wait to buy one. I haven't seen how that looks though, the airbrush method....