Wulf Ratbane
Adventurer
I'm wondering if the pathfinder rule has too little downside for the specialist wizard. More spells most of the time, but still retaining much of the flexible spell selection of a generalist wizard.
I think so. It creates a "false choice."
Regarding your math-- giving you the benefit of the doubt on whether the comparison is valid or not-- the total addition in spell levels would be:
1+2+3+4+5+6+7+8+9 = 45
This would bring the wizard's spellcasting value up to 0.51, an increase of 0.10, or 10 feats.
Or, 1 feat every other other level; or 1 feat per added specialist spell slot.
(This would value the 1st level spell slot as 1 feat and the 9th level spell slot as 1 feat, but of course then we start to get into what 1 CR means at 1st level vs. 20th level, etc. You and I don't need to go down that road-- paved by UK-- again I hope...)
Some drafts of Trailblazer had the specialist wizard gaining only the bonus ready spell and not the bonus slot, but I felt it was too great a departure.
Would still be a good house rule if you find specialist wizards too powerful (even with banned schools).