The Custom Spawner is set to only accept creature codes but I may be able to make a spawner for loot crates.

The beauty of this is the spawners give the ability to try out "map" designs on their own, without a map. I love playing exploring another person's piece of work, but of course it makes me want to try it too. :)

I was about to ask exactly the same, it seems more people interested on the feature.

Maybe you can just Remove that limitation on the Custom Spawner,
like an option on the menu to switch from the "cheat spawndino" to "cheat summon" mode?

This is how you can do it without the "cheat summon":

cheat spawnactor "Blueprint'/Game/PrimalEarth/Structures/SupplyCrate_OceanInstant.SupplyCrate_OceanInstant'" 1 0 0

cheat spawnactor "Blueprint'/Game/Aberration/WeaponPlantSpeciesZ/Structure_PlantSpeciesZ_Wild.Structure_PlantSpeciesZ_Wild'" 1 0 0

cheat spawnactor "Blueprint'/Game/Aberration/Structures/PowerNode/PrimalStructurePowerNode.PrimalStructurePowerNode'" 1 0 0

cheat spawnactor "Blueprint'/Game/Aberration/Structures/PowerNode/PrimalStructurePowerNode_Damaged.PrimalStructurePowerNode_Damaged'" 1 0 0

cheat spawnactor "Blueprint'/Game/Aberration/Structures/GasCollector/GasVein_Base_BP.GasVein_Base_BP'" 1 0 0

cheat spawnactor "Blueprint'/Game/Aberration/CoreBlueprints/ItemLootSets/SupplyCrate/SupplyCrate_Level80_Aberrant_Surface.SupplyCrate_Level80_Aberrant_Surface'" 1 0 0

The spawners don't use "cheats" to spawn creatures.

I have been working on implementing the loot crate feature but will also think about the aberration stuctures.

You are right, I mean as a workaround for Admins while the new feature is on development,
the cheat spawnactor works ok but stuff get deleted on server restart, but for a public place is ok.

I put wild plant Z on the shop so player dinos get heal while they buy on the shop.

Going to upvote this suggestion :) I had no idea spawnactor actually worked. I've added so many aberration dinos to other maps to make things easier, but adding charge nodes and such would be a blessing!

As Workaround you can change Crafting Cost materials that you cant get on your current map for Stone, I do that to craft all Aberration stuff on my server, kinda change Gems for Stone and so on.