Complex sentence: The initial plan was to do another' season; many former castaways were contacted but either declined or were cut when the idea was changed to "Fans vs. Favorites", requiring fewer returning players.
Split into simpler sentences: The initial plan was to do another' season. Many former castaways were contacted; some declined, while others were cut when the idea was changed to a "Fans vs. Favorites" format, requiring fewer returning players.