While thematically it looks like nice pairings, mechanically thats a pretty bad way to set things up.
Evocation and Conjuration are both the 'do active things' schools, so its fine in its own right(neither of them are much good for setting up ongoing effects, save for conjuration's Calling). They have lots of stuff you can do in combat, and conjuration provides out of combat. Theres a lot of overlap, but the sheer strength of conjuration makes up for that.
Abjuration and Divination on the other hand, have nothing 'active' they can do, in particular, for specialization, you need to consider spells that might actually be thrown multiple times a day. Not such a good idea when you contrast it with the active schools.
Enchantment and Illusion now, are similar to the first group in that they overlap heavily. Except, they have the exact same weaknesses, and target the same save subset.
Necromancy and Transmutation at the end, is also similar, but with the sheer strength of transmutation pulling it ahead, not to mention buffing necromantic minions with transmutations.
So...overall I'd like to ask, whats the objective of this consolidation? I can see this being of use if you went with the 'narrow spec' option and eliminated the option to use spells outside your speciality entirely(which would thus give each school a 'stock' fighting style), though I doubt the conjurers or transmuters would notice much.
