The idea that you need a plan or roadmap before you start a trilogy is nonsense. Not to mention that the only Star Wars trilogy that had a plan and roadmap was the prequels, and they’re objectively worse than the sequels.
You don’t NEED a roadmap, but it would have been a good idea. You definitely need directors who try to tell the same story and not turn it into the argument sketch.
– Kylo Ren wears a helmet!
– No, he doesn’t!
– Yes, he does!
– There is big bad force user in charge!
– No, there isn’t!
– Yes, there is!
– Rey’s lineage is important!
– No, it isn’t!
– Yes, it is!