prosfilaes
Adventurer
Rebalancing and reprogramming are required to remove, unless WotC does it for us; making a list is required to add.
You don't want alignment, say that there's no more alignment. Done. Every time you have to wonder, how does this feature work in the absence of alignment, the person adding alignment in would have to wonder how should this work in the presence of alignment.
If that was true then fishooks wouldn't be very useful.
Is a fishhook an optional system for an RPG? Not that I know of. It's at least as nontrivial to add an integrated subsystem to a game as it is to remove one from the game, and most optional subsystems have seen minimal support and minimal integration with the rest of the system.