[Bozos of Bones]

I wouldn't just change the opposing schools, I'd totally axe the current system. The spells/day is the thing I absolutely hate, the source of all grief, imbalance, boredom and stupidity. I much prefer the point system like psionics, but it would have to recover naturally over time somehow, without sleep. Meta-magic would increase the point cost of spells, and with some feats you could willingly decrease the effectiveness of a spell to save up on points.
As for schools, I agree with Illumina and the idea of Planar schools for Divine Casters.