I love the Entity/Component System discussed here:
Maybe it is a good idea to keep the Sponge API as simple and lightweight as possible …
I prefer a simple basic system with modules/plugins, instead a huge library that need massive time to update
So the Entity System can be a plugin (similar to Citizens or RemoteEntities)
The SpongeApi provides only basic stuff for entites (spawn, kill, teleport).
That also decrease the update time for the SpongeAPI.
What you’re talking about might make sense if we were making a server. But we aren’t, we’re making an API for a server that already exists. We can’t just turn off all of Minecraft’s entity logic and reinvent it in a plugin.