When I see this excuse I just shake my head, because it is the weakest argument for anything relating to the new films.
In this instance, because Lucas is widely acknowledged to be a crap dialogue writer, that we should continue to expect crap dialogue.
In any case, I'd take your challenge - Finn's "Chrome Dome!" line was just terrible. Besides the fact it literally was straight out of "Teenage Mutant Ninja Turtles", it also took me right out of the film, in the only good scene that Finn was in. Mentioning an Earthly material by name like that was just lazy and not-Star Warsy. And Lucas would have never done that.