Except everything you say is wrong.
All change in this show goes back to Steven's initiative and a few external events and there is quite some of that. But sure, it's all the same. There is no massive shift here as Steven's growing powers and responsibility deepen the dent he is making.
There are not three Gems that defected from Homeworld added to those on Earth. There is not a lot uncovered about who Rose Quartz was, Steven has not begun to consciously make moral choices for the good of the group, Connie has not become a sword-swinging child soldier, Amy has not stopped playing pretend as real achievements have given her much deeper satisfaction and improved her self-worth, Pearl has not gone forward and processed the loss of Rose, and of course there is not suddenly a big uncertainty hanging over Steven as well as the Diamonds regarding the death of Pink Diamond. Oh, and Lars has not been resurrected as a pink zombie space pirate portal thingy.
I think Sugar put it best:
But it still changes
In little ways
When everything stays