The preorder "bonus" for PS4 is 28 points/day this month. So, not much as KH bundles were only there for a day or two on Gamestop list. I don't think this will matter much in the end.
Concerning the Slim/Pro and S/X ratios, I won't do it as I want to keep things as simple as possible for my updates. This is a good idea though, and I think everything you need is available in my update posts if you feel like tracking this.
Okay, think I can do that, no problem. I'll start on February 1st so we'll have a full month to test on.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454