Unfortunately I wouldn't say it is very easy to use - the Wikipedia editor is much easier. It's also completely unclear which parts of Wikidata data are used in Wikipedia, and where.
That means the Wikidata data is usually much worse than the Wikipedia data, even if it theoretically easier for machines to use.
I'm not sure what you mean when you say that the editor of Wikidata isn't easy to use, I think its interface is pretty straightforward.
(English Wikipedians in general are very "territorial" in my experience, so to speak, and rarely appreciate efforts that put some piece of "their" articles beyond their "jurisdiction", like Wikidata does. Editors from other language versions are a lot more welcoming.)
I agree it's pretty easy to add a Freebase ID to a Wikidata ID. Unfortunately this isn't really that valuable, because it's easy to a machine to work it out too.