I've never mapped from ZDoom, but going by the names of those objects, they sound redundant since we have linedef executors and all.* Editor Things "Object enters sector" , "Object Hits floor" and "Object Hits ceiling" (Similar to the ones used in ZDoom) .
Already present in development builds and being used in development maps.* Linedef effect "Walkable middle texture" To make it easier to create Bridges, Fences .. etc with simply some middle textures .