Zhayne wrote:It bears noting, though, that nothing forces him to read a scroll, so if he doesn't want it, he can leave it alone.
A character who has chosen not to read the scrolls would be many levels behind a character who does.
That being said, I entirely agree with your post but you'd need something in line to ensure the anti-magic guy isn't falling behind the guy with the same HD but more levels. I'd talk it over with the player and see what we can come up with; first thing that comes to mind would be some sort of anti-magic boon where instead of reading the scroll and becoming a better caster you read the scroll and become better at killing casters. Stuff like spell sunder and whatnot.
I would try something like this; I like the anti-caster idea. Some other possibilities might be as follows:
1) Give anyone who reads a scroll an effective increase in casting ability (as though through a casting-increasing prestige class), but no other benefits associated with the level (HD, saves, BAB, class features, etc.). Allow characters with no spell casting classes to choose a spell list and gain some minor spell casting.
2) As above, but allow non-casters to select an X/ day spell-like ability. This has the advantage of possibly affording the non-casters access to a few level-appropriate spells, rather than a bunch of low-level ones.
3) Keep the spell-like ability idea for non-casters, but offer casters the opportunity to learn an off-list spell. This has the benefit of maintaining some sort of parity, as no one will be gaining casting ability that far preponderates what is appropriate for character level.
4) Boring idea: make everyone effectively gestalt, with the second class required to be an arcane casting class; restrict the second class so that one can only level up in it by reading a scroll (and the scroll can't affect the primary class) and perhaps stipulating that one can't achieve a level in the secondary class that is more than, say, two less than one's primary class level. Adds utility and versatility, but won't make anyone TOO insanely powerful.