Complex sentence: The deal transformed the Wranglers from a cellar-dweller to a powerhouse almost overnight, but the league allowing the transformation of the Blitz into a lesser version of the 4-14 Wranglers raised questions about the USFL's credibility--especially in Chicago.
Split into simpler sentences: The deal transformed the Wranglers from a cellar-dweller to a powerhouse almost overnight, while turning the Blitz into a lesser version of the 4-14 Wranglers. The transaction raised serious questions about the USFL's credibility--especially in Chicago.