In the original trilogy we get to see at least X-, Y-, A- and B- wing; and TIE -fighter, -advanced, -bomber and -interceptor. But in the new film all that is basically reduced to X-wing vs TIE fighter.
I'm more interested in out-of-universe explanations, what creative process led them to reduce the variety of craft in the film (in-universe is covered here: Where were the capital ships and bombers?)
Is there any behind the scenes out there that addresses this particular point?