they've grown so much

I loved the character development we saw when Pearl and Amethyst fused. There wasn’t an elaborate fusion dance, and even if one would have been great,at the same time it was an flawless and instant fusion, it cost them nothing at all. In contrast  to the first season they haven’t been fighting at all and they are much more understanding with each other and it showed in that fusion.

Also finally more Opal, hell yes!