How do I handle this better

[Spy-Shifty_1]

First of all here you can read more about it:

New SubScene & ConvertToEntity workflows

With the Unity.Entities release today, we are adding support for SubScenes and the new ConvertToEntity script. The main concept is that instead of using ComponentDataProxy / ComponentDataWrapper. We simply convert existing game objects or MonoBehaviours to pure entity data. This is the same workflow we used to build the MegaCity demo. This makes it possible to create content for Unity.Entities in an effective way. We have updated the HelloCube samples to show it: This scene uses ConvertToE…

SubScenes helps you to cache entities in edit mode. This means you don’t have to convert it at runtime. On the over side you have the flexibility of gameobjects in edit mode.

And some extra… If you split your world into multiple you can easily load and unlod parts of your world (streaming) without performance impacts.