As a follow up to limiting Entity access for App Users and Data Collectors and after receiving feedback on user needs, we are exploring single ownership with the ability to bulk change owners as an improved version of Phase 2:
Users will be able to select multiple Entity rows and scroll or search for an App User or Data Collector to transfer ownership to.
@ahblake does this get closer to solving for your use case more quickly?
@chun_hing_yap if you use an App User as a group as @LN mentioned, might this get you closer to what you need? For example, searching by trees species or region to assign ownership?