So what you're saying was, because Palps had no backstory in the OT, we should have just played the same tune again and Snoke not have any backstory... I think the Sith Lord that turned a Skywalker child to the darkside and made him his lieutenant, people would like to know about it.
9 has plenty of plotholes, but it's basically fan service. So I grade it as fan service. My only gripe is that it wasn't MORE FAN SERVICE. Episode 7 pretends to be a fresh new movie when it's really not. It was the safest possible movie Disney could have made and they were rewarded with it. Make a safe movie and destroy box office records, or not play it safe and maybe not get a billion.