I don't want them to timeskip that far ahead. Old lady Fate, Nanoha, and Hayate FTF, and they might phase them out of combat completely if they did that. Nanoha characters age well if Lindy's any indication, but still.
They should find a way to make her healthy again (and more mature and less of a boring moeblob) without the timeskip. Or just forget about her altogether in favor of better characters.