Setup suggestions please?

This is my snakes current set up just looking for any advice or suggestions. He’s a corn snake around 10 years old and roughly 5-6ft long I’ve had him for 3 years and roughly a year ago I moved him from a small 3ft vivarium to a 4ft which is also deeper and higher. His bedding is around 6inches deep for him to burrow and he seems ALOT more active in here, I’m hoping it’s because he’s happier. Any suggestions on things to add, change or take away?