Where is the change projectile command? Yeah we can change the sprite, but we can't change projectiles.
And I can remember way back when we were given the ability to use commands like:
enemy 12x=[enemy] as an example. Notice how there is no ID in the []. That's because there is auto detect. We have this for enemies, but everything else doesn't get it. I find this quite annoying that we can do it for one thing, and not another.