A masterpiece does not require an enormous story, theme or anything else "epic". That is a characteristic of blockbusters.
Was your gripe about superfluous scenes, where you mentioned the forest planet, a reference to the first few episodes of season 2? That forest plant is Yavin IV, the plant where the rebels eventually build their first base, and those rebels are some of the first recruits to the rebel army. I believe those scenes were intended to show how the rebellion lacked leadership and how Andor and others had to step up to provide that leadership.