I'm not suggesting removing alignment completely. I'm suggesting treating the 9 point alignment the same as other D&D style alignment system. The LG-CE model doesn't work for every setting and D&D is a game with multiple settings.
As a standalone change, it's a reasonable suggestion. Definitely worth considering. I'm looking at the larger picture, and definitely didn't want to imply that your idea was inherently bad. But there are a plethora of suggestions about how to make D+D inclusive by making <insert feature here> optional. At a certain point, "optional" slides from being a feature to being a problem.
To paraphrase E. F. Schumaker for RPG design: "Any fool can make a game more inclusive by removing anything that could be seen as marginally distasteful. It takes a touch of genius to include years of history and game mechanics in a way that is both fun and inoffensive."