I really dislike alignment system - it makes characters so one dimensional. Being evil for the sake of being evil and reveling in "evilness" is such a played out trope (in reality chaotic evil most likely to play out as murder hobo and lawful good plays out as lawful stupid). I much prefer game of thrones type of morality - no one is really that bad, no one is really that good, they all have different conflicting goals and seek them in variety of means.
The problem with that is DND started with alignment system when there was creating DND and pretty much every plane monsters deities and npcs have alignments I mean the whole reason why demons and devils are at war is because of there behaver if you take out the alignment system in DND you are going to have a hard time trying to explain why demons and devils don't work together to take on the higher planes in a great war
