Ignoring the issues of balance for the moment, and looking at things like dwarven wizards and other things some oldtimers find disturbing... it's easier for a DM to say "That thing doesn't exist in my campaign" than it is to say "Oh, and there's also this thing in my campaign, and it works like so and so." It's the "so and so" part that makes it more difficult. Therefore, it's better for the rules to provide options and for the DMs to provide restrictions on those options. Preferably, the options presented should be reasonably balanced though.Graf said:About half the people posting have said something like: But a DM can ignore/disallow/rewrite the offending rule.
If that's the case then why aren't you playing 2e? Why buy books at all if you have to re-write the rules yourself all the time?