Well, it's somewhat easier to use the hosted builder because it's one less thing to keep updated locally.
i agree with that, it would be awesome if the b4ibuilder jar could download an exact copy of the lib folder in the hosted builder. like this we could have an updated lib folder in our local builder and not need to make sure to update libraries as firebase framework that is updated frequently.
it could also be a button inside b4i -> "Download Hosted Lib Folder"
just a thought ?