Substantially keep alignment like it is, a generally useful introductory tool for new players and method of describing their characters.
I'd also largely keep it for NPC Monsters and Humanoids. The difference is that intelligent creatures, humanoid or otherwise, would default to Neutral and have some cultural stuff added to their creature descriptions for examples of why they might come into conflict with PCs or Society and need to be battled.
Things like Lizardfolk being Neutral, but their territorial nature and aggressive posturing combined with their tendency to perform cannibalism dispassionately as a means of survival often puts them at odds with settlements near water sources.
Stuff like that.
I'd also largely keep it for NPC Monsters and Humanoids. The difference is that intelligent creatures, humanoid or otherwise, would default to Neutral and have some cultural stuff added to their creature descriptions for examples of why they might come into conflict with PCs or Society and need to be battled.
Things like Lizardfolk being Neutral, but their territorial nature and aggressive posturing combined with their tendency to perform cannibalism dispassionately as a means of survival often puts them at odds with settlements near water sources.
Stuff like that.