Maz, like Han, like Leia, like Poe, were completely irrelevant to the story. We didn't even have enough time to know anything about Maz's character. Remember Dexter Jesster? Maz is his TFA version.
Just in ESB, we are given enough info about Lando:
-Han doesn't trust him.
-Leia doesn't trust him.
-He govern an entire city.
-He appeared to be a tough character, but he was playing with Han.
-He is more hug-friendly and extrovert than Han.
-He has a strong sense of style and fashing, as he wears a cape.
-He is a womanizer, but in a gentleman way, unlike Han's more macho version.
-He cares about Han, even when he's forced to help the Imperials
-He ends up risking his life to save the heroes.
-He orders the evacuation of Cloud City.
-He gave jobs to thousands of people, in a city who was operating outside the Empire's watch
What does we know about Maz?
-She makes some jokes to Han about him and Chewbacca.
-She works as a weitress in her own cantina, which has a giant statue modelled after herself.
-She has Luke's saber unprotected, ready to be taken by a thief or touched by one of our protago... oh wait.
-She... I guess she doesn't care about anyone, because she didn't witness the destruction of the Hosnian system like everyone else, nor she helped evacuating the cantina.
-She has a cantina in the middle of nowhere... for no reason given...
-She gives Finn a lightsaber, and then disappears for the rest of the movie.
And people like TFA?