Fantastic looking pizza after the adjustments. It looks like you got the oven temp down, and the crust looks light, airy, and nicely blistered. Good luck to you. I am jealous you get to bake pizza in that oven every night!
In regards to bufala, you might try draining the product on absorbent paper towels before service. You will then be able to get the same size piece as fior di latte. If you still have problems with a watery pie, you might also try another source/brand. They do vary wildly in regards to water. Especially if the ones you are using have been previously frozen.