Version 1.1.7 (the final patch) refined character move sets and fixed exploits found in the launch version.
DLC added iconic arenas like Midgar and Suzaku Castle , filling out a stage selection that was already considered superb. Wii U Exclusive Highlights Super Smash Bros. Wii U - Video Review
The final updates bring the total roster to 58 fighters. Crucial DLC additions like Cloud , Bayonetta , and Ryu introduced unique mechanics that changed the competitive meta significantly.