Hi PATCHEM,
Wow! 1200 bars of soap! I guessing this is going to be a commercial operation? I'm not sure about oatmeal making soap creamy. I have only tried using it once and the bars I stored got unpleasantly fungal after a while. perhaps I did something wrong.
Anyway, on the subject of coconut oil and creaminess, my experience is that it is good for bubbles rather than creamy lather. Perhaps that changes when you get to higher percentages but I've never gone over 25% with coconut oil in any batch to date.
Hope this helps a little.
cheers,
Grant