LR4 Book module: please add more full-spread layout options, and exporting options

I *LOVE* the new book module. As a wedding photographer who does layout for many albums and books throughout the year, this interface and workflow is such an improvement from PS, InDesign, "SWAT", etc. I just have two important suggestions:

1) When exporting, I need *both* the spreads and the pages to export as full spreads. Right now, to .jpg export, the spread layouts export as spreads and the pages as half-spreads. Can we at least have the option? I know you're linked to Blurb, but I usually use album companies that require spreads.

2) More importantly, we really really need more layout options. Or a way to customize existing ones? Or both! Specifically the 2-page spread options that I use a lot: For example, in the 12x12" layout I want one photo to fill the spread, but then to inset a smaller image over the spread image. This should be an obvious option ;) but a bonus would be if we could adjust the position of the layout.

There is one layout that I like, the 2/3 full spread image with a smaller vertical image overlapping the right. But where is the option that has the image to the left of the spread image? We really need the option to FLIP horizontally some of those layouts. Further down the road, a dream list of mine would be to add the opacity option to an image/frame :)

Attached is a reference image to the two issues I mentioned.

If I could just get those TWO layouts added as presets, I would send you some homemade chocolate chip cookies -- they are literally the best. You just have to trust me on this! Thanks,