Shawn, Your Chicken looks Mighty Tasty, but since you still want to Tweak it...
Peanut Sauce is nothing more than what you already have with the addition of Peanut Butter...minus the OJ...so no need for a seperate bottled peanut sauce.
You might try adding some Hoisin Sauce...sweetened fermented soybean paste...to your recipe above, plus Ginger. That will give you the taste of Chinese BBQ Spare Ribs and/or Chinese Roast Pork (Char Siu). Koon Chun Hoisin...is the brand many restaurants use, but it is usually only available at Asian Markets...There will probably be a thinned down version in the Asian Section of your local Megamart, labeled as Hoisin or Chinese BBQ Sauce.
Japanese Teriyaki Sauce (Shiny Grill Sauce) is basically Soy Sauce, Garlic, Ginger, Honey and Mirin (Sweet Rice Wine) with a little Rice Wine Vinegar, to balance the sweetness. Both Mirin and Rice Wine Vinegar are usually available in the Asian Section, and will make a Sauce/Marinade that tastes WAY BETTER than the Bottled Teriyaki.
With a couple of more additions to your Pantry, you can make a bunch of Sauce variations. I hope this helps...JJ