I would love to see an episode like this, hopefully as a two parter. Just imagine how Steven and the remaining two gems would react to one of there own getting corrupted. The Crystal Gems reluctantly trying to defeat her while Steven tries to reach out to her. Many manly tears would be shed. Plus it would be the perfect point for them to discover a way to fix corrupted gems.

"FOR THE LOVE OF ROSE QUARTZ STEVEN! I AM NOT A BIRD!"