It sounds boring to the kiddos but they need to do what Jeb talked about years ago and burn an update cycle on tech debt. Clean up the codebase so things can be more readily improved. How much better would it be if stairs, slabs, etc. were given core, block level inheritance, so you could have any block as a top/bottom/side stair/slab/fence/wall/etc, with or without fluid inundation of any fluid? They put all that work into waterlogging fences and stairs to get underwater ruins but they didn’t make it just a universalised system.