I'd also like to know if theres some hope for 1080p 30fps. I don't know if its something we can control since the data in the xml file looks like it's pretty much set for 30 fps, and if it were that easy I get the feeling Samsung/Google would have flipped the bits for it already.
Also, the numbers in OP are way too high. I strongly recommend a capped bitrate of 20mbps for max and a min of 12mbps. I was finding that at 32-60mbps range my files were way too huge and the quality difference, if there even really was one, was not worth triple the file size. Any perceived increase in quality may also be credited to "placebo" effect.
My settings give files 1/3rd the size on disk that the OP's give and at what appears to be the same or similar quality.
Samsung Galaxy Note 2 on Verizon
Jelly Beans Build 16 - Perseus 36.3