Now we have a function to swap items in the items configuration menu, so you can organize your Crate at will.
Also now there is a command: /mekacrates rewardcommand [crate] [command] which will make the item you holding be added to the crate as a command reward instead of the item as a reward.
/mc skipanimation for players who are willing to skip the animation of the crates previously set by the Staff members, but only if the player has the permission for that