Very promising tool, but in my opinion it’s still missing some important key features
here are my top 5 key features that I think is a “must have”:
1 - Scene Rotation (A: Skybox Independent Rotation, B: Skybox + Lights Rotation, C: All scene rotation including 3d models) this is very important!
2 - Scriptable Sky Objects for managing multiple skies per scene (each HDRI sky have their own light, light position, Sky rotation and settings) like presets skybox scenes
3 - HUD for Gameplay mode, with all the options of the editor (ability to change the HDRI image, camera settings, materials etc, in game)
4 - FX and LUT settings
Good luck with this 