In theory, that'd offload population and increase stability.
But there's always going to be big instances that are just naturally more populated.
Account creation is tedious so people may not be willing to make a new account. If there was an easy way to swap instances without account creation, that might reduce issues.
It will be interesting to see how well lemme.ee grows and whether things can stay stable throughout lemmy as a whole. Hopefully funding doesn't become a major block in the future.
I don't think there's enough attention on these consistency concerns. I'd like to see a lot more discussion and acknowledgement that the federation property itself is experiencing issues and not all content is distributing consistently.