Other than what LBPHacker said, if I recall correctly, the developers don't intend to add any new elements for the time being — especially if they have no practical use.

Yes. Some seem like rpg things that got mixed up. 

jacob1:

@Hythonia (View Post)
Actually I do want to add new elements for 96.0. But not these, since all 3 are rejected.

Oh! My bad. I remember one of the developers saying once that they don't want to add more elements. Still, yeah – these aren't the best ideas if you want to add any,

INFINITY-BOI:

why does all new players are suggest stickmans , command blocks and moving solids -.-

Mostly because they don't realize the problems adding them could cause.