It's worth trying some of the strategies suggested to make the hides feel more secure. It's also worth considering...just doing nothing. You've been messing with the enclosure a lot. Let your snake settle in.
My snakes go through phases with hides. Some use them constantly but swap hides a bit; others rarely or never use hides. In addition to true hides, I like to provide cork rounds and areas of heavy cover (using fake vines) so that the snake has some choices.
Your snake is new, so is still figuring things out - and it can take several weeks for them to decide what their favorite spots are. Just as an example, I needed to add a new, larger hide for one of my Antaresia pythons. He completely ignored it for a solid six weeks - I mean he didn't even go near it. Now it seems to be his favorite spot. Go figure.
One quirky little thing I've noticed is that every one of my snakes that happens to have a sky hide and/or one of those Zilla Rock Lair hides just loves them - with the Zilla hides, maybe it's because they actually need to crawl into a little cave-like area and they feel more secure there. With the sky hides, I'm not sure. Even my terrestrial snakes spend a ton of time in sky hides. So much so that I'm planning on adding a sky hide for every snake.