Don't skip scraping the browned bits after the sear. That fond is concentrated flavor that goes directly into the rice and sauce.
Cover tightly. Any steam that escapes means less moisture for the rice to absorb and can result in undercooked rice at the bottom of the pan.
The 10-minute rest after baking is important. It lets the rice finish absorbing the liquid and the sauce settle into a cohesive, smothered consistency.
Shredded mozzarella or provolone melted over the top in the last 5 minutes of baking is highly recommended.