They weren't meant to model personalities in OD&D. After that, TSR and WotC designers constantly attempted to make them personality tests (probably in response to players not understanding them), which is one of the reasons the three-by-three alignment grid is a meme now known to the general public.
Never apologize for Alan Cumming or Macbeth content.
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no i've read many many articles over the years even by Gygax and company that tried over and over to prevent the modeling of personality by alignment. Now they often confused people by then telling them what a person with a LG morality would find acceptable and what a person with a CE morality might do totally wiping out all the effort they put into explaining that personality and alignment are not related but do affect each other on the periphery. I've found the only way I've ever actually made that point is to play a LE or CG alignment and let the other players guess whether I'm good or evil. They always guess good when I play LE and they always guess Evil when I play CG. Because my CG character often refuses to accept the law and order schtick and will break people out of prison, openly flout laws, lie to get his way and none of that conradicts thier morality. My LE characters on the other hand tend to be superficially kind, thoughtful and very good at reading people and what motivates them because that makes them useful. So they stroke the ego's, make them feel good and use them to accomplish tasks that bring law and order to their benefit. I've only had one player in 30 years ever call me out playing a LE character. Everyone else thinks the Law and Order thing is a lock for good. Sadly not much different than political discourse.
Counterpoint: if the only way to integrate the new material is to start over, it is a bad idea.
