It would be nice to be able to create alias's/synonyms. The use case would be to swap out collections and/or data movement activities. For instance, fill up a collection with some data, then swap it into the spot where the application can see it.

db.mycol.save(

)
db.alias(

)
db.myprodcol.find()

db.mynewcol.save(

)
db.alias(

)
<locks for metadata swap>
db.myprodcol.find()