Just an FYI but modern DnD and WotC are moving away from the strict alignment system.
BG3 very much feels like it was made with more complex morals in mind and the simple evil vs good play-through isn't the most ideal way of playing the game. It has a lot of flexibility to be able come to terms with different play styles and decision making processes.
Wrong. You can play a "neutral" path and you're still gonna end up on a loosing side when it comes to companions. Wyll and Karlach will leave no matter what if you won't HELP the grove. The game doesn't offer any sort of meaningful content for evil or neutral alignments.