In my family, we add more ingredients to improve frozen pizza. Also, I lower the heat.
I always "build up" the pizza by starting with the spices and olive oil (the spray will work as well). We use mainly: tumeric,cumin,cinnamon and sage, Italian spices are good too. Add a dash of curry if you like it spicier. Don't over spice it, rather drizzle olive oil. Crush the spices in your palm to help bring out their flavor.
Thinly sliced onions go next. My personal favorite is to tear up some deli honey ham,then lightly whisk an egg and drizzle. This helps the cooking process and gives an almost quiche taste. Then we use deli cheese. Tear or crumble the cheeses so they're even,then top with chives and sliced tomatoes. I give a quick dust of butter or olive oil spray to crisp the cheese.