Laravel uses the property $table to customize the table name. In Laravel-MongoDB, you can use both $table or $collection for this.
We can deprecate support for $collection in v4.last and remote it in v5.
Provide a Rector rule to make the update would be easy.

For reference, we were close to a breaking change https://github.com/laravel/framework/pull/52186

https://github.com/laravel/framework/pull/52171#discussion_r1683412186