I agree with the OP, but I take it one step further. They shouldn’t have stopped after the first trilogy, they should have stopped after the first film . As I explained here (in March 2019):
The best Star Wars movie is Star Wars . There is no such movie as “Episode IV: A New Hope.” it is called Star Wars and it is the best one. Period.
It has a simple and comprehensible plot (based on archetypal stories as outlined by Joseph Campbell), likeable characters, decent (if not stellar) acting, a certain gravitas lent by Alec Guinness, humor, good action, and a satisfying ending. It invented the concept of the “used future,” helped bring SF back to mainstream movies (something of a mixed blessing, as it turned out), and pushed the boundaries of movie SFX in the pre-CGI era. It was rollicking good fun.
*The Empire Strikes Back * is not the best SW movie because it doesn’t stand on its own: it’s clearly only a bridge between two other movies. And Return of the Jedi is not the best because having teddy bears defeat storm troopers is stupid.
The prequels are perhaps the worst films ever made in the history of the universe. They make Plan Nine From Outer Space look like Citizen Kane . And all the rest are tired rehashings of the first three, and/or heartless corporate attempts to extract ever more cash from the little kids who gaped in wonder at the first film and desperately want to somehow relive the magic that was [the one and only] Star Wars .
ETA: I haven’t seen ROS and probably won’t, at least not in the theaters.