My thoughts are
- the idea of specialized magic users who have a more focused spell list but gain other abilities instead is a good one
- the implementation of classic specialist wizards (an extra spell slot per level, losing access to one or two other schools) was kind of dull, if often mechanically useful (especially at low levels, more spell slots were worth a lot); in part this had a lot to do with huge variation in how useful the various schools were
- on the other hand, the late 3.x dedicated specialist classes (warmage, beguiller, artificer, dread necromancer) and some 4e builds of various arcane classes had a much more flavorful spin on the idea
- except possibly a simple 'blaster mage' concept, I don't think dedicated specialists are something that should be in the first player's book
- the idea of specialized magic users who have a more focused spell list but gain other abilities instead is a good one
- the implementation of classic specialist wizards (an extra spell slot per level, losing access to one or two other schools) was kind of dull, if often mechanically useful (especially at low levels, more spell slots were worth a lot); in part this had a lot to do with huge variation in how useful the various schools were
- on the other hand, the late 3.x dedicated specialist classes (warmage, beguiller, artificer, dread necromancer) and some 4e builds of various arcane classes had a much more flavorful spin on the idea
- except possibly a simple 'blaster mage' concept, I don't think dedicated specialists are something that should be in the first player's book