You're taking the current elements for granted. Sure, we do need a high-pressure explosive, but we can make thunderbombs. And if you want more pressure from C-4, make more C-4.
And DUST could be put as Sawdust, which is little chips of wood. I know that wood isn't turned into it when applied to pressure, but that would break saves.
Now be content with our elements and put them to good use, instead of whining about new elements which TPT is not looking for at the moment.