Actually, an episode where they all think Shiro is dead and all try one at a time to pilot the black lion with increasingly hilarious results would be great.
And then the mice get in there and the lion starts moving and everyone is like what even except it turns out that Shiro just came back. And like, he's fine and they did all that for nothing.
Shiro can't die until his amnesia issue is cleared up and we find out what happened to Pidge's family. Also the Lions and the personality of their pilots are rather fixed.