With Dwimmermount heading into its tenth session this weekend, I've been having some minor thoughts of regret about not having implemented a couple of mechanical changes I'd considered before the campaign began. Both concern magic and are fairly minor in the grand scheme of things, certainly not significant enough that I'd bother to retcon them into the game, but I think their inclusion would have added some nice color to the game. I may have to add them to any future campaigns in the world of Dwimmermount.
First, I wish I'd combined the magic-user and cleric spell lists into a single list and eliminated both the cleric class and the weapon restrictions for magic-users. I'd tag certain spells as "white" or "black" and players would need to choose between the two paths. White magicians would gain the ability to turn undead and black magicians could command them. With lower hit points and a lack of heavy armor, white magicians would be weaker than standard clerics but more flexible. This suits the generally sword-and-sorcery tone I favor.
Second, I'd give the elf a separate list of spells that borrowed from several sources. I like the notion that elvish magic is an expression of their innate magical nature rather than an artifice. Their available spells should reflect that. Likewise, unlike magic-users, they wouldn't need to seek out new spells for their spellbooks, since they wouldn't need them. Like AD&D clerics, they have full access to all spells available to their level and do not need to learn new ones. If I chose the spell list carefully, I'd probably also eliminate restrictions about casting while in armor, even non-magical armor, and simply make elves a natural multiclass in the general vein adopted by Moldvay except with a spell list that's slightly less potent than that of a straight magic-user.
Neither change is a momentous one. I've already house ruled bits of Swords & Wizardry to produce similar effects, but they're on the fly fixes rather than the result of careful deliberation beforehand. Perhaps that's for the best. I want this campaign to be a crucible for organic rules evolution, after all, and that's certainly what's happening. Still, I'm a systematizer and it's hard to resist the urge go back and rationalize things after the fact. I'm slowly learning to just let it ride, but it takes effort and runs counter to my normal tendencies -- one of many lessons I have not yet mastered.