Jonas's POV of his community is changing because he becoming curious to why they still don't have some of the things we have like snow or sunshine or hills. Even when the Giver tells him they caused some problems he still says they would be nice to have.
I also have a few theories about Jonas's community, the first is Jonas's community doesn't know what color is. I think this is true because on the cover the apple is the only thing that's in color, does this mean when Jonas saw the apple change in chapter 3 he saw the apple like an apple we would see, a normal red apple but it wouldn't be normal for him because everything in black and white. This theory would also work with the Sameness because to stop jealously or be bullying for how you look, they would take away color.