You should add templates to creative that have stw stuff. They should be created through the Creative portals (like the brand templates) and published islands with stw templates should be found in a brand new STW Discover tab. In creative, STW guns and items should be accessible and also should be placeable in item spawners, vending machines etc.
BUT, STW items collected from STW islands should NOT SAVE IN YOUR STW BACKPACK. Also, in STW Templates, all evolutions of weapons should be available, just In different categories. Demonstration:
Weapons/melee
Copper
Silver
Malachite
Obsidian
Shadowshard
Brightcore
Sunbeam
There also should be Husk Spawners,
Storm Shield Devices, Amplifier Devices, Atlas Devices, Lars Van devices, Rail Traps, Bomb Device, Hit The Road Car devices etc. AND a Perk Recombobulator Bench. Plus, if you consider adding this, don't give the players in 1.0 only grid islands. Give them all maps from STW.